/sci/ - Science & Math

>>12136466
Reputability is a dumb meme
What's the point of wasting all that deltaV when you could dramatically increase efficiency

>>12136466
Tonight at the Boeing R&D lab...

First

>>12136476

>>12136476
Half the R&D team leaves early as all clocks in the office show the wrong time

>>12136476
A bolt gets screwed into a RoCkEt

>>12136476
The stokers get the monthly performance bonus at the 18th!

AIR
BREATHING
NUCLEAR
POWERED
SINGLE
STAGE
TO
ORBIT
SPACE
PLANES

>>12136479
dang it Goddard rockets don't fly that way!

>>12136498
Da.

Today in history:
>1932 – Nikolay Rukavishnikov, Russian physicist and astronaut, was born (died 2002).
>1944 – Charles L. Veach, American colonel, pilot, and astronaut, was born (died 1995).
>1954 – Takao Doi, Japanese engineer and astronaut, was born.
>1977 – Voyager I takes the first distant photograph of the Earth and the Moon together.

>>12136495
Engineers sit around watching the glue on the weekly tile dry!

>>12136498
>find out about project pluto
>huge unmanned nuclear powered scramjet bomber
>would drop its payloads and then fly down within a few hundred feet of the ground
>fly at hypersonic speed spewing radioactive byproducts while knocking down buildings with its wake

jesus christ

>>12136523
Giant space planes are unbelievable based

>>12136531
I honour the effort you're putting into this, but birthdays are really not that relevant, specially if they displace 75% of the post.
>1977 – Voyager I takes the first distant photograph of the Earth and the Moon together.
Probes doing anything always make my eyes wet
https://www.youtube.com/watch?v=-Hbp8QYUQpc

>>12136523

>>12136542
Why wait for the end times when we can just build our own horseman?

>>12136535
And Hammond flies a 737 MAX!

>>12136559
I know, but it feels half like an incomplete post if I just include one or two.

>>12136576
>HAMMOND!

>>12136476
Bad news! The SLS has been delayed again!

>>12136535
Meanwhile 3 other tiles already glued to the vessel fall down again.

>>12136587
>half
No idea why I included that word.

>>12136593
Oh no!

>>12136495
The most expensive rocket...

...in the WOOOOOORRRRLD

>>12136587
>>12136599
It's just a pitch. One is okay as trivia. Again, thanks for the effort!

>>12136600
Anyway, there seems to be an ISRU experiment going on in Florida, if we could just bring up the footage here

is anyone else disappointed by the underutilisation of starships predecessors? (besides falcon 9 obv)
dont get me wrong i think starship is amazing and im really fucking glad its happening but its a real shame how we're never gonna get crazy shit like propellant crossfed falcon heavy and apollo style moonshots using crew dragon.

NEAT
E
A
T

https://mobile.twitter.com/TheDeadDistrict/status/1305482276684345345

>>12136635
ISRU testfire

>>12136610
>apawllo
heh

>>12136650
This thing will never fly.

>>12136653
ISRU apparatus for making glass

>>12136658
Maybe Russian national pride is wounded enough for them to do something interesting

>>12136661
We are afraid James May was superheated into glass during that testfire. Nevertheless the company reports that the ignition procedure has been refined to peak economical viability.

>>12136675
JAMES MAY FUELED HYBRID ROCKETS

>>12136661
I happened to co-author a recent peer reviewed paper about Lunar ISRU :)

>>12136479
>>12136488
Is this the Russian Space Web book?

What total TWR do you need for a horizontal liftoff SSTO spaceplane? Encyclopedia Astronautica says the Star Raker design (>>12136564) was about 0.91. For a spaceplane with the same runway mass as a fully loaded Shuttle orbiter (a reasonable size for a spaceplane by any standard) that works out to about 90 kN of thrust. Even with magic propellantless thrusters delivering 10N/kW you'd need a >9MWe nukeplant weighing <45 tons (so 5kg/kW) including shielding to make it work... and also airports that don't mind nuclear planes on their runways.

http://www.astronautix.com/s/star-raker.html
http://www.astronautix.com/s/spaceshuttle.html

>>12136639
Moon Dragon with a real service module and a Heavy to launch the LEM would be so cool.

>Japanese rocket

This generator works really well for the /sfg/ capslock design memes.

https://ilovecitr.us/bloomberg/

>>12136707
>Rockonese japet

uwu whats this. looks like they are testing the sabatier process for starship

>>12136707

>>12136817
>the other starship facility is still alive
what exactly do they do here? I recall a while ago elon had the 2 competing against each other or something? But it seems like texas has won so...

>>12136817
i believe they will build a full scale methane facility here

>>12136828
Probably experimental stuff, and eventually for NASA launches.
>hey NASA we can build our rockets on site on Cape Canaveral instead of shipping them from Alabama by riverboat
>also they're 500x cheaper

>>12136650
>russia is doing nuclear space before US

REEEEEE WE'RE GONNA HAVE TO PLAY CATCH-UP AND SURPASS THEM AGAIN

>>12136817
https://www.youtube.com/watch?v=4n5qII7laYA

11 minute mark

>>12136885
Its ten years before its ready to fly.

>>12136466
Gulf storm is now Beta
I'm too lazy to come up with a joke

>>12136786

>>12136900
should've been Panda Express desu

>>12136900

>>12136786

Are there any like pencils or pen which look like rockets? I mean we all need writing utilities and rockets usually have a fairly pen like shape. I didn't really find any.
Picrelated is a tiny model, but it was cheap, like 10 bucks and surprisingly high detail. The print is sharp, the tower has very detailed features and even the different booster sizes were accounted for.

I also just had the idea that we could make that an /sfg/ thing. Take a writing utensil, paint it like a rocket and post it. You can even print out decals and glue them on adding the exciting side effect of inhaling the glue while you're at it, or use toothpicks or matches as Boosters. And then after posting your work, you can either display them and they aren't massive dust magnets, or alienate your coworkers and suppliers with it if they ask for a pen by nerding out over what it is supposed to represent.
Which is pretty neat.

>>12136898
https://www.youtube.com/watch?v=XCkEdB87yGA
Here you go then. I'm too fucking lazy too, it's friday and I ate too much dinner.

>>12136786
Hopefully it still makes sense without the question marks.

>>12136900

>>12136950
despots

>>12136786
Can we stop this low quality garbage? Its taking up too much screen realestate from real discussions.

https://voyager.jpl.nasa.gov/mission/status/

Voyager 1 passed 14 billion miles from Earth this week. Try not to be too envious.

Excuse me, ladies and gentlemen, can I have you attention please?

Fuck urf!

Thank you and have a nice evening

>>12136915
back in the early days of Falcon 9, they called it the "space pencil" because of its high fineness. Someone should design a rubber pencil top in the shape of the current Falcon 9 fairing and sell them with white pencils!

Ready for the pop?

>>12137109
it is rather thin without some SRB's to increase its dimensions

>>12137109
>>12137121
I'm making one right now.
Will post it.
I like the idea of adding a bit of diy to sfg.

>>12137116
Somebody good with animated gif's should make a cylon edit out of that lil' guy.

>>12136892
it wont fly at all. how much shit do the russians say they'll have in 10 years? theyre working on yensei, venera d, fully reusable rocket, destroying the last survivimg burans. now nuclear gay boy?

at least china is attempting a lunar sample return soon. watch them claim sovereign ownership of the landing site and piss on the outer space treaty (haha). and then US congress cries "why didnt we do sample return in 50 years?"

remember, china is the future!

>>12137152
>"why didnt we do sample return in 50 years?"
Because, by that logic, the US would've already claimed the moon half a century ago, so there'd be no point.

>>12137152
Chinese metallurgy is shit. They have yet to build an engine like raptor even if they have the specs for it

>>12137149
You do it you lazy ass

>>12137157
I am not good with animated gifs.

>>12137156
>Chinese metallurgy is shit.
That doesn't matter anymore, they can just hire the talent to set up a production.

>>12137155
US congress already whined when the chinks landed that rover on the far side, asking why we didnt do it lol

>>12137161
Made some Gifs from the MER Delta II video

>>12137158
that's noob thinking, you gotta break out anon

>>12137156
lol they dont need raptor. just 5 F1 class kerolox engines on the first stage will do it. hell maybe they'll be hypergolic. might blow up a few but they'll get it eventually

>>12137169
The Delta II was based. Thank god they preserved the last one for a museum.

I used to watch that “Mars: Dead or Alive” documentary when I was a little kid over and over again

>>12137180
But everyone told me it's better for those SSMEs to smash into the Atlantic and yeet them to pieces. That's what it's all about bro. fuck museums, yeet yeet yeet

>>12136466
What's the progress on starship this year? I haven't been following anything since last fall

>>12137177
>just 5 F1 class kerolox engines on the first stage will do it
Too bad this is all they have, a RD-120 derivative.
https://en.wikipedia.org/wiki/YF-100

>>12137198
what are they using on the falcon 9 ripoff?

>>12137202
Who knows, that's a paper rocket. Maybe they'll buy more engine tech from Russia, maybe they'll try and make their own, maybe they'll try and use YF-100 for it. Who knows.

>>12137195
Constant failure, explosion, delay, explosion, delay etc
Starship won't be usable until 2030 at this rate

>>12137195
Pops, bops and hops

Yeah I really like the tiel paint and watched the how to get to mars video like 50 times or so.

>>12137132
>>12137109
>>12136915
Here's my progress, I've put a pencil into my powerdrill. I turned it round and added this little step with a file and sandpaper. It was pretty easy. But I don't have good paint so there are like 3 layers on it already. I think I'm going to add details with the sharpie only because I hate to wake up my printer and the pos always takes so long to spool up. Should I add boosters?

>>12137207
ah. I expected as much. I was hoping elon would pull through

>>12137195
Why making ugly hamster house instead of Von Braun ring.

>>12137210
>bops
what are bops?

>>12137211
Great work, aussie.

>>12137195
>borg cube propellant depot
Resistance is futile, Senator Shelby.

>>12137026
so slooooow

when can we skip the loading screens and get straight to the action?

>>12137217
big hops

>>12137214
lol

>>12137244
>JPL activates timewarp
>intern fails to press "," before the rover misses its maneuver node

Why is the Planetary Society against space colonization?

>>12137215
unlike a sci fi ring station, a large modular space station is technologically feasible within the next two hundred years

>>12137244
this thing better work. i'm going to be so upset if parachute fails or something

>>12137214
you're being trolled, he's about to roll out a mostly functional second stage to test the landing maneuver
but it's Elon time so who knows when that'll happen

>>12137261
full of SJW's

>>12137244
went down to 31.6 million miles to Mars since taking this screen lol

>>12137261
how are they against space colonization?

>>12137244
NASA should start adding external cameras to their probes, and livestream the journey.

>>12136476
HAMMOND YOU IDIOT YOU BROUGHT A BOOSTER SUSTAINER

>>12137247
sounds neat!
>>12137228
Yea I'm from Europe, the gravity is all fucked up here sometimes because of our shitty old medieval infrastructure and all. We still have to summon pornhub on the Magic crystal ball of fortune and as you might expect the browsing history stays on these forever which sucks because the telecom gypsies like to blackmail you with this shit.

>>12137261
MUH COLONISATION IS RIGHT WING NEO NAZI VOCABULARY
MUH MICROBES

>>12137305
>months of empty starfield taking up tons of bandwidth on the DSN
Great idea.

>>12137296
https://www.sciencedirect.com/science/article/abs/pii/S0016328718303136
https://www.space.com/bill-nye-space-settlement-not-colonization.html

>>12137305
or plaster them with lewd anime decals...

>>12137326
I love this pic

>>12137261
The Planetary Society probably isn't, but that woman who wrote that shit worked on rovers. She's out of a fucking job if manned exploration takes over.

>>12137283
retard

>>12137330
I'd watch it.

Actively broadcasting with any form of technology, thereby exposing our position to anyone listening should be treated as treason against humanity. What the absolute FUCK possessed people to go

>hurr durr send mesages into space and make contact with le ebin friendly star trek aliens for science xDDDDDD :^)

>>12137345
we're alone retard

>>12137336
>https://www.space.com/bill-nye-space-settlement-not-colonization.html
>"Colonize" carries a lot of baggage.
We should force these people to "settle" on the sun.

>>12137349
Absense of evidence is not evidence of absense, any civilisation with two brain cells to string together would immediately realise that exposing themselves in any way to a potentially massively hostile universe is fucking retarded.

>>12137336
>Linda Billings, Ph.D., is a social scientist and consultant to NASA’s Astrobiology Program and Planetary Defense Coordination Office

this bitch

>>12137362
>social scientist
>consultant

aka absolutely useless to NASA

>>12137336
>Last year, for example, astronomer Lucianne Walkowicz organized a conference called "Decolonizing Mars," which tackled some of these issues head-on.
>Walkowicz

EVERY

SINGLE

FUCKING

TIME

>>12137360
Yeah, I believe in ghosts too, retard

>>12137362
>social scientist
>astrobiology consultant
lmao what is she gonna consult on? the social order of microbes?

>>12137362
Women should be kept barefoot and chained in the kitchen holy fuck.

>>12137362

>>12137369
Not an argument

>>12137339
you should. I got called out by some ocd anon for using an inappropriate navball angle so I went ahead, went the extra mile and fixed the god damn navball.

>>12137362
Go home gamer girl

>>12136786

>>12137386
That's more of a case of someone making broad opinions on a field that this person is not trained nor knowledgeable on.

>>12137368
Great astronomers conference on how to colonize Mars, weak astronomers conference on how to police the language of the former.

>>12137315

>>12137411

>>12137397
beaucoupzero?

>>12137397
based

>>12136476
>>12137426
Does no-one here have the webm? for shame.

>>12137343
Good one

>>12137426
That was their new Stigship, yup.
And saved, I didn't have that in my top gear folder.

I always like seeing the planet shadow.

>>12137513
>going sticc instead of thicc
bruh...

>>12137411

>>12137543
Early tech tree doesn't allow thick.

>>12137547
kek

>puts froge in space before NASA

Scientifically speaking, should you trust West German stamp dealers?

>>12137336
>settlement
How very Jewish of them

>>12137562
I don't get this one.

if cruz becomes next SCJ are there any potential problems that could arise for boca chica? (not american but I assume he stops running texas if he takes the job)

>>12137569
ted cruz is BIG PP on spacex

>>12137569
>if cruz becomes next SCJ
This is almost certainly Trump's nominee (if they decide to fill the position before January):
https://en.wikipedia.org/wiki/Amy_Coney_Barrett

>>12137557
Is Pepe Gagarin ready for another flight?

>>12137579
Yes he's taking a trip on 4GAS to Venus
https://www.youtube.com/watch?v=2uRLJZxINAQ

I did it. Here's my first pencil rocket.
It's a 3 stage 2HB fueled mars rocket with srb's (Screw Rocket Boosters. Yea. I know.) .
Think your pen can best it?
Then make one and post it here.

>>12137562
kek

Is this the most meme propulsion technology ever?
>Worse of both worlds
>Can't scale up to be used for small sat launchers
>Has the Isp of a Solid
>tough to model
>TVC is a fucking pain in the ass because you can't gimble ffs.
>Academia has high praises for it even though it hasn't been demonstrated to actually work well IRL outside of sounding rockets

>>12137596
Hybrids^^^

>>12137569
Apparently Ted said he would decline the offer a few days ago.

>>12137577
If it's anyone else but ACB the Republicans are morons

>>12137596
Hybrid motors? They're very niche, but they're easier to make than liquid propellant engines while being much safer than solid propellant motors. Useful for trainees and garage engineers.

>>12137596
Which is why Autismstralia is PEDAL TO THE METAL

>>12137596
Methalox is the worst, it tries to hard to play as kerolox or hydrolox, but its really just the worst of both fuels only
>Shit ISP compared to Hydrolox, but not as dense as kerolox so it still needs fuck huge heavy tanks
>Needs fancy new engines that don't exist yet
>Pollutes as much as kerolox
I don't get why søypace thinks wasting taxpayer money is worthwhile on shit

>>12137596
Academia has high praise for a lot of things

>>12137601
that's good to hear. Is it because he wants to run for president or get a VP some time in the future?

>>12137566
Kike "settlements" in Palestine

>>12137579
Pepe's protege Vladimir Koomarov is the prime crew for this flight. You remember I was working on Shitpost Starship and a Falcon Thicc at the same time. Starship got finished faster, that's all.

>>12137622
oooo BIG smart anon

>>12137611
and the only advantage is on mars even though the moon is the most realistic goal in Elons life time.They should have went for a hyrdrolox Raptor IMO.

>>12137629
lmao hydrolox wont die!

>>12137611
Congress should mandate all AMERICAN MADE rockets be equipped with hydrolox first stages (manicured in the great state of Alabama)

>>12137611
I agree, replace that stainless steel hazard with a beautiful orange foam tank, and equip that sucker with some patriotic American made rs-25 engines, powerful solid rocket boosters, and a j2 upper stage for that kick to send Americans to the moon

>>12137656
Don't forget the Utah built Solid rocket boosters

>>12137663
>and a j2 upper stage
Nah, not American enough. Just cluster some RL-10s to keep those engineers employed.

>>12137663
Remember, musk wants to allow millions of americans to enter space, restricting their lives. Space must be restricted to a small group of elite scientists from our great, American Astronaut Corps for the next 400 years while they ensure the solar system is safe for americans.

I wonder if I can print my own 4ASS water slide decals...

>>12137663
>Calling them RS-25 instead of SSME
based?

>>12137670
Sorry, the chicoms hacked my post. Meant to say endangering their lives.

https://www.youtube.com/watch?v=vThgsKfwIOQ

Made a video on my old youtube channel, I was that anon a couple threads back asking for suggestions. Already had a script written up for the first vid, but I'd like to lean on you guys for ideas. I've got some spare time, so I might as well do something.

I'd love to hear comments, criticism, and hate, especially on editing, it's my first time using any kind of software and the transitions feel retarded as fuck. Thanks guys.

>>12137740
First thing I notice within 30 seconds is you switched music quite abruptly for that transition, this creates a jarring effect on the listener. Now when you talk about chang dumping NTO filled boosters onto villages around 45-50s in the music cuts out all together, again, jarring. Same going from around 1:00 on to when you discuss Hydromeme and the SSME's nightmare valve system. Also between 1:00 and around 3:00 you flub a couple words slightly which you could edit out, it's a pain but doing a few retakes can significantly improve video quality.
So I'd say smooth out your music transitions, tracks directly adjacent to one-another ought to sound similar if you can find ones that work, maybe slowly fade out one and fade in the next one so it's not just an abrupt cut from the end of one track to the start of the next. Make sure to do retakes if you flub any words or phrases, over-editing is indeed a sin, but make sure to get a good clean take for each sentence/paragraph/thought.
This may just be a personal taste thing on my part too, but overall you sound a bit like you're giving a lecture to a class or a company board. There's nothing wrong with having a script or reading from one, but the trick that separates an average presentation from a good presentation is tricking the audience into thinking you aren't. You have good clear pronunciation for the most part, now you just need to work on making your speech flow a bit more naturally.

>>12137740
im gonna cancel you in the comment section for being a racist 4channer

>>12137740
I liked the music a lot. Not enough people put jazz in their videos.

>>12137771
don't do it you fucking faggot

>>12137766
Really good advice. Thanks man. You're right about the editing, I would always mess up a work or two so I just left them in lol. Same with the speaking, gonna work on it for the next one.

>>12137771
My sponsors can't find out bro...

>>12137774
Thanks lol.

Also does the second part about mach diamonds sound better than the first? I switched rooms and want to know if it matters.

sno-freighters driving on europa when?

>>12137315
triple core rockets are not booster sustainers

i FUCKING SWEAR MAMI NEEDS TO BE PUT ON A HYPERGOLIC CHINK BOOSTER REEEEE

Is the Raptor actually the real deal futuristic rocket engine that blows everything else out of the water or is Elon just memeing?

>>12136695
Drop your magic propellantless drive's output to 5 kN, and lift off and start climbing using chemical engines instead.

>>12137890
elon fanboys are just fanboying

>>12137890
Full flow staged combustion is pretty awesome, and methalox is ideal for ISRU on Mars. It's no F-1, but it's not meant to be.

>>12137890
It actually;
>has the highest chamber pressure ever
>uses the best combustion cycle, offering the best performance for a given propellant combo WITHOUT needing complex labyrinth seals between hot fuel and cold oxidizer or vice versa)
>is capable of going from zero through ignition to full throttle in about two seconds
>can throttle dynamically across a wide range
>self ignites using spark-ignited methalox torches, requiring no ignition fluids or other systems
>has one of the highest thrust-to-weight ratios of any engine ever, and specialized 1s stage booster variants could one day beat out the king (Merlin 1D)
>did NOT fall for the hydrolox meme

Is Deadly Reentry just a fucking meme? Even at 60% heat setting it just blows everything up even with a comically shallow approach from LEO.

>>12137916
I thought it uses lasers to ignite

>>12137908
F-1 was complex, heavy, low pressure and expensive. It was the most powerful single-chamber rocket engine ever, but in all other ways other than thrust it was kinda shit.

If the F-1 was the size of the Merlin 1D it would only output 430 kN. Conversely, if the Merlin 1D were the size of the F-1 and maintained its current thrust to weight ratio, the "Merlin 1D-Max" would output 13,310 kN at sea level. The Saturn V using five of these M1D-Max engines would have just slightly under double the thrust on the pad, which would mean the first stage could be stretched by an additional 80% without even touching the 2nd and third stages, and the rocket would GAIN thrust to weight ratio at liftoff.

>>12137924
No that's some russian shit, SpaceX uses electrical arcs in small-volume chambers to ignite a little torch of methalox, which blows into whichever chamber is being ignited. A little spark cannot reliably ignite a chamber multiple liters in volume full of cryogenic liquids, but a slightly colder and much cleaner version of an oxy-acetylene torch definitely can.

>>12137927
The way they tested the F-1 was cool though. They blew up dozens of engines before reaching the production variant.

>>12137933
It was cool, but it was also dumb brute force, cuz that's all they had. Once they actually started inducing combustion instability on purpose in a well understood manner rather than making changes and crossing fingers, they got much better results and were able to make smarter changes.

>>12137935
Well yeah it was a brute force solution. I’m more of a fan of the RD-170 myself simply because of how versatile it is.

RIP energia though. I wish our timeline saw us using four F-1 powered boosters for the Shuttle. Probably would’ve needed just a single SSME on the external tank, too.

>>12137381
You're welcome

>>12136576
oh that has not gone well

>>12137940
F-1 engine boosters replacing the solids on Shuttle would still be better than real Shuttle, but unfortunately it would still be a shit launch vehicle. The earlier, more ambitious designs would have been effectively as reusable as Starship, except not as capable due to carrying more dry mass and using (probably) lower pressure engines. Still, while the 300-ish dollars per kilogram that those designs would grab wouldn't compete with Starship's roughly 30 dollars/kg, they'd beat the piss out of the $20,000/kg that the actual Shuttle had.

F-1B revival when

>>12137890
It's an extremely high quality engine, however it doesn't excel in any category except thrust-to-weight ratio. It's an engine that's very good at being average.
Want to have smaller fuel tanks that don't need lots of insulation and cooling? RP-1 is twice as dense as liquid methane and has a boiling point of 217C.
Want an extremely high ISP? Pretty much any LH2 engine beats the ISP of Raptor.

There's going to be situations where Raptor just isn't the best engine suited for the job.
However, Raptor is the perfect engine for SpaceX. SpaceX can't afford to make loads of engine designs, so a single top-tier engine that offers decent performance in any role is very convenient.

>>12137980
The thing it's really good at is its practicality-methane helps with preventing coking,it starts itself without using impossible to replenish hypergolics, and it incorporates materials science wizardry to create hyperexotic Inconel structures that handle insanely hot oxygen rich conditions like a gentle sunday afternoon. Other rocket engines are optimized within the constraints of being ultraautistic perfection,this thing is a Toyota pick-up you can repair with a hammer and some grease.

https://www.youtube.com/watch?v=xnWKz7Cthkk

The age of milling out tanks from aluminum and worrying about every pound of weight are over. This is when we start to just get on with it.

>he doesn't mill
ngmi

THICC
I still need to sort out the fucking upper stage RCS though

>>12137274
A Von Braun ring was possible in the fucking 50's.

>>12137916
>has the highest chamber pressure ever
>has one of the highest thrust-to-weight ratios of any engine ever, and specialized 1s stage booster variants could one day beat out the king (Merlin 1D)
I wonder what the engineers think the theoretical max chamber pressure is for long-term operation, and how long it will take to exceed that theoretical max because Jesus is personally holding the engines together.

Possibly dumb question about the efficiency of the Sabatier process.

Would it theoretically be possible for a private individual with home solar energy to build a small scale Sabatier processor to generate methane from the atmosphere, store it, and then run it in a natural gas generator during long periods of poor sunlight? Essentially a backup to the battery backup. Is the efficiency such that you would never be able to scale it large enough with consumer levels of solar? Would it be a massive waste compared to just adding more battery backups?

>>12138133
Yes, but probably prohibitively expensive and inefficient.

chariklo manned mission when?

smaismrmilmepoetaleumibunenugttauiras

Elon is going full on braking bad .

oort cloud brown dwarfs when bros?

你好, 我爱长征火箭。

>>12138259
based, china is the future

>>12136817
Yet more vaping memes.

>>12136828
It was less Texas winning and more Elon realising that splitting his ressources like that was only going to lead to both sites taking longer than neccessary.

>>12137305
>>12137344
Here you go, anons.

>>12138247
Do simulations suggest such things should appear during star formation? Given the simplicity of the physics involved, simulations should be very trustworthy.

>>12138315
it was a political gamble, he's got Texas completely on his side now

>>12137588
good work anon, keep it up, proud of you

The Australian sounding rockets launched successfully
>launch 1
https://youtu.be/9VePOAEAK8I
>launch 2
https://youtu.be/BkVNqUGXI_Y

Does this count as an Australian or Dutch launch? I've seen it going both ways.

>>12138370
are these the hybrid engines?

>>12138382
vid shows slow ignition so most likely hybrids.IDK why solids are so rare in APAC because solids are superior to hybrids in sounding rockets

>>12138288
不错,你的答案是对的。

>>12137336

>>12138400
>>12138382
prop is APCP, and it's a Dutch rocket launching from Australia (why?)

Guys ... something looks different about SLS
https://youtu.be/VkER2e4J3uw

>>12138400
>>12138382
>>12138435
http://www.t-minus.nl/products/dart/

Here you go. AP composite grain, only 5 seconds of burn. 22 kg of grain.
Still enough to reach Mach 5.2 with such a tiny rocket.

>>12138435
Its from southern launch so its in the middle of tittybong no where

>>12138443
Ancient render from back when painting it was on the table.
Then they realized painting it was going to add too much weight to the poor asthmatic and they dropped that from the designs.

>>12138467
That's really fuckin sad. They should at least paint the first like like the first shuttle tank

>>12138473
Why? The payload capacity is already shit. Why add to its misery by the piece of shit?
Right now they're applying what they learned during the shuttle program with weight saving measures to kind of unfuck a fucked rocket, but in a proper timeline they would have just parked the SRBs and gone for the pyrios boosters instead.

Hell, they could have gone for a full F-1 based first stage and the rocket would have turned out not too bad payload capacity wise.

is rong march 9 cancelled? just like that?

>>12138482
It's a paper rocket.

https://twitter.com/blueorigin/status/1306955741383852034?s=19
OH NO NO NO NO

The silent giant WILL reign supreme

>>12136817
VERTICALLY
INTEGRATED
FUEL
PRODUCTION

>>12138204
i wonder what it'd actually look like to be inside the rings of saturn. would it look like elite dangerous with a bunch of big rocks or would it more be a thin layer of tiny dust and ice particles

>>12138010
t. the virgin aluminum miller

HYPERSONIC
HYPERGOLIC
HYPER RETRO
PROPULSION

>>12138556
SUPERSONIC
ACROBATIC
ROCKET-POWERED
BATTLE-CARS

>>12138556
对hypergolic是我最喜欢的汽油

REUSABLE
PISS
BOTTLE
ROCKETS

Berger has sources implying Trump will replace Jim Bridenstine with Jeff DeWit (who left NASA bc he didn't see eye to eye with Jim) if he wins the election. Biden too instends to replace Bridenstine, likely with Lori Garver or some other woman.

I'm worried bros...

>>12138435
>(why?)
see pic
>>12138211
>muh spaceplane may may
They still can't even make engines good enough to work without hypergolics.
>>12136828
>>12138315
Also wasn't the USAF (now USSF) charging millions just for range fees for a launch?

>>12138608
JimB remain or we revolt

Creating methane on Mars is a meme. Where will they find water?
Fuck you elon, no ISRU for you.

>>12138608
Couldn't find much info on DeWitt's space policy. Is he an SLS shill?

>>12138651

>>12138651
Piss

>>12138651
"Where will they find water?"

>>12138702
It's a mystery.

>>12138662
DeWit had no experience in the space industry before he was nominated. He has on record supported Artemis and SLS, but that's not surprising. He's likely more oldspace friendly, as people familiar understood "he and Jim don't see eye to eye".

There's political pressure behind the scenes to replace Bridenstine to further politicize NASA, as evident by Trump and RNC's recent trolling. Hopefully that rhetoric is dropped after the election if Trump does win. I hope Bridenstine stays on, and Trump would be more likely to keep him on than Biden. But shit, things are looking spooky

>>12138608
dude looks like a total scammer, using the george hotz character analysis meter

>>12138718
Welp. I hope they don't go through with it. Big Jim's done as good of a job as anyone shackled to the SLS could have done.

>Producer/Editor
https://boards.greenhouse.io/spacex/jobs/4809190002

New job from SpaceX

>>12138608
FROM MY COLD DEAD HANDS

>>12138608
Where did he say that?

>>12138750
https://www.interplanetary.org.uk/post/203-eric-berger-and-life-on-venus

>>12138756
>>12138750
starts @44:20

>>12137740
>>12137794

the first part before switching rooms sounded better
it sounded like the switch happened on the "ignition sequence start" part though

also there are parts that has audible ragged breathing
either you're rushing through your script, or maybe you're too close to the mic that it picks up your breathing

>>12138783
It's the mic I think, does it sound like I'm talking too quickly?

>>12138718
Frankly I wouldn't put too much stock into the idea that Trump will replace Bridenstine with some pencil pusher with no experience. He's first and foremost a businessman and I'd imagine he views a lot of these department heads the same way he would a foreman working on constructing one of his hotels. Bridenstine is long proven, he's had a lot of association with the industry in which he's working, he legitimately cares about the project, and above all in spite of numerous setbacks and multiple major fuckups from Boing!, he's still making significant progress.
In the end though, Commercial Crew is much more important for human spaceflight advancement than Artemis is, and it's a project that started under Bush as commercial cargo, survived two administrations of cancel-happy Obama, and survived Trump's first term to finally bare fruit with Dragon Crew2.

>>12138819
I'm not really concerned about industry experience honestly. If the dude disagrees with Bridenstine's management, I worry what DeWit would change. I don't see a better pick than Jim

>>12136786
if you remember, you remember.

>>12138094
wrong. a von braun ring was only imagined in the 50's. we still don't have the technology to assemble structures like that in space

How do you build self-recovering solid boosters?

Obviously they can't retropopulsively land like a Falcon 9 since they can't be throttled. Maybe they can helicopter down after jettison by extending stowed rotor blades. No extra fuel needed since autorotation provides all the lift.

>>12138702
the real question is how will they automate the process of breaking up ice and separating the water out, then pumping the water out of these craters. somebody is going to have to invest trillions in this kind infrastructure before settlements on mars can be more than boy scouts 24 month camping trip

>>12138891
parachutes?

>>12138890
could you build it on the moon's surface and hoist it into LLO and then move to LEO?

>>12138891
program them to burn out at a lower rate further into flight and completely run out of prop when they touch down. also solids can technically be throttled in funny ways

>Rogozin - Venus is Russian clay!
https://www.sciencetimes.com/articles/27334/20200917/venus-russian-planet.htm

>>12138915
kinda want rogozin to pee in my mouth

Anyone here interested in a video on Soviet Space Stations?

Starting with Soyuz 4 and 5 and ending with Mir-2 and the ISS.

>>12138917
I kinda want him to cut down on the fucking cocaine or whatever space drugs he's on and actually do something instead of just posturing and sell engines designed decades ago.
He's a fucking joke.

>>12138915

>>12138921
They're working on that ISS module, any day now....

>>12138045
Some RCS ports are just busted. They can't figure out crossfeed or anything.

>>12138919
As long as you bring up the most based Salyut, Salyut 3.

>>12138890
strap some inflatable bigelows together in a ring shape

>>12138944
This. Just scale the inflatable tire station up, and then later weld some steel plates around it.

>>12138886
I love the F9s and spacex, but imagine we had these Atlas V with the beautiful 2000s aesthetics and all like two decades ago doing the self landing thing. Imagine the change in history and how beautiful it'd have been.

>>12138211
straight up copying SpaceX

>>12138890
>we still don't have the technology
But we are the technology level where it should be fairly trivial if we put our mind to it.

>>12138960
Yes, but I'd like to see them try and throttle down their existing engine tech (YF-100, another clone) to be able to land that clone.
China is the land of copypasta.

>>12138939
How could I forget?

Anyone have any cool stories you want in it? I'm also going to talk about the mold, Volnyov and Soyuz 5.

>>12138725
lmao even resembles Chris Roberts a big, multimillionaire king of scams

>>12138962
but anon! space is hard!

>>12138960
Don't act surprised, everyone is going to start copying spacex in the near future.

What's your favorite astronomical body

>>12138971
a bit*

>>12138950
would have been neat!

>>12138950
Yeah, but that was doomed from the start when they picked Russian no throttle engines and SRBs to launch them.

>>12138982
your mom

>>12138982
my peenus weenus of course

haha!

why is russia partnering with china in space? are they ceding their place to china to remain relevant? that doesnt sound v russian to me

>>12139004
russia is space KEK

>>12138993
Yeah I'm just talking aestetics, I guess.

>>12139004
America is partnering with Japan, they're probably panicking and desperately trying to partner with someone, like the guy who didn't bring a date to prom.

>>12138973
Not that anon, but I would happily welcome that. The launch market needs to be competitive, and that can't happen if SpaceX is the only one interested in opening space access.

>>12139012
does anyone have a pic of le frog rocket?

>>12139009
>coming this fall
>that one jock who lost his position on the sports team, has fallen out of grace, and is only kept around due to his previous prestige
>he finds himself out-competed by an eccentric foreign exchange student
>he dates the obviously sociopathic girl and brings her to prom to try to prove his worth

>>12139022

>>12139031

>>12137345
If nearby aliens exist and are hostile, they wouldn't need to wait for radio transmissions, they would probably just study a planets atmosphere and if unstable molecules like oxygen were found, throw a few asteroids their way every few million years.

>>12139033
Eurocuck penis rocket

>>12139031
>>12139033
is this the Turbo Frog?, i thought it was smoller

>>12139031
>"It seems to be more of a research roadmap"
It clearly states to be a research project based around a hypothetical monopropellant polymeric nitrogen fuel that we can't even produce.
God damn fucking pop sci clickbait shit writers need to die a painful death.

>>12139038

>>12138944
'Put metal plates on inflatable modules' was literally von brauns plan.

Speakinf of inflatables couldn't you just launch a stripped down dragonXL sized spacecraft with an uninflated bigelow module inside, inflate it and BOOM, instant station module?

>>12138960
If people aren't copying SpaceX/Musk's ventures, then they're stupid.

Are reusable Chinese rockets going to land on graveyards and bring the dead to life?

https://www.popularmechanics.com/military/aviation/a34030586/air-force-secret-new-fighter-jet/
>1 year
imagine the same but with a new rocket, or spaceplane, SSTO....

How do I get a job at a space agency if I don't want to join the military and I don't enjoy physics? If I study chemistry can I be a rocket fuel mixer or something?

>>12139102
but where would the cost-plus fit into a 1-year project?

>>12139119
That's the beauty of it Shelby, there is none!

>>12139105
Are you just getting into college? Chemical, Mechanical, Electrical, and Software engineers are all hired. Also where do you live?

>>12138993

>Russian no throttle engines

???? The RD-180 is able to throttle. There are plenty of videos in wich the operators are talking about reducing the thrust of the RD-180 during max-Q.

>>12137980
>RP-1 is twice as dense as liquid methane and has a boiling point of 217C.
It also murders your engine reusability economics because of muh coking, also the density of the fuel alone matters less than the bulk density (the average density of the total volume and mass of propellants). Because methane requires a different mixture ratio with oxygen than RP-1 does, and because oxygen is much denser than both methane and RP-1, the bulk density of methalox when sub-cooled is actually not that far off of the bulk density of kerolox.
>Want an extremely high ISP? Pretty much any LH2 engine beats the ISP of Raptor.
Sure, with the tiny caveat of requiring you to use hydrogen-embrittlement-proof alloys in all your engine hardware as well as having by far the shittiest bulk density of any bipropellant combination. The difference in bulk density between methalox and kerolox is small enough that the increased Isp of methalox more than makes up the difference, however even the huge Isp increase of hydrolox can only afford you slightly better performance overall due to the mass fraction hit, and that's with a larger and thus more expensive to build rocket.

Depending on whether or not coking is an issue, sub-cooled propalox is probably the actual ideal rocket bipropellant. It has a bulk density slightly greater than kerolox, and an Isp almost the same as methalox. If FFSC is possible with propalox, a Raptor-scale engine could probably do close to 400 bar chamber pressure during normal operation and get a thrust to weight ratio somewhere around 250. A booster using propalox would have smaller tanks for the same mass fraction compared to methalox, but enough power to push tanks LARGER than what methalox engines could push. Building single stage vehicles with >10 km/s of delta V and starting TWR of >1 could actually be possible using densified propalox FFSC engines. They wouldn't be launch vehicles, they'd be vehicles built on Earth and used as SSTO elsewhere in space.

>>12139163
It's one engine with two combustion chambers for a single Atlas V. It can throttle from 47% to 100%.
Merlin engine is 9 engines per rocket and can throttle between 60% and 100%.

Do you see where this is going?

>>12138811
no, the speed is actually alright
on second listening, it sounded more like you're reading sentences as they come and sometimes the sentence goes on a little too long and had to catch a breathe at the end

>>12139174
More carbon and less hydrogen per molecule = more coking, less energy per mole weight.

>you can use gunpowder to make a rocket
>you can also use sugar + saltpeter a rocketfuel that has a higher ISP than gunpowder

Does it mean you can load bullets with r-candy instead of gunpowder? Asking for a friend

>>12139195
I wouldn't want to clean out the barrel after firing a few shots.

>>12139105
You know how on starship build videos there are a lot of construction workers working on the rocket tanks? Things still need to be welded, bolts still need to be tightened, etc.

>>12139188

The quantity of engines is not the thing that was wrong about that post. It was the fact that the RD-180 was supposedly not throttable which it is.

For Atlas-V to be a Falcon-9 analogue, it should have 5 RD-191's at the minimum. 2 to replace the RD-180, 2 to replace the SRB's and 1 for backup.

>>12138010
I like to tell normies about how shitty some of the oldspace projects are, especially normies with jobs as millwrights
>Yeah so, they start off with a 3.5 inch thick plate of aluminum alloy, then they bump press it into-
>Bump press?
>Two guys with chain hoists put this 3 ton plate of alloy through a hydraulic press about a quarter of an inch at a time and bend it into a half-cone shape over about three months, then -
>So is the metal that thick because the pressure is so low in space?
>So then they take it over to a giant 5 axis milling machine and they mill away 90% of the aluminum plate so that it's all about half an inch thick-
>What? They MILL it all away? Why?
>Because if they welded together the same pressure vessel it'd need to be 2% heavier in order to have the same strength

>>12139205
The point about my post was the RD-180 can never throttle low enough to land an Atlas V.
If the Atlas V was much bigger and ran on say 7 RD-180's, it would be feasible.
Because this is not KSP.

>>12139195
You can, it probably wouldn't be advisable though. It has higher ISP because it's more energetic than smokeless powder, and much more energetic than even coarse gunpowder. It also leaves a lot of deposits, so assuming your chamber doesn't burst from the pressure it will be filled with gunk and shit after even a single shot.

>>12138123
Honestly it's probably possible to go almost arbitrarily high in terms of chamber pressure, the issue is at some point you can't get additional chamber pressure by being smart and eliminating pressure drops in your engine plumbing, your only option is to just add more mass to everything in order to hold the increased pressure. I would think that at that point the chamber pressure gains start to scale at least linearly with mass gains, meaning you stop getting TWR increase. Realistically, there's no reason why the preburner couldn't be at 2000 bar, with a 500 bar pressure drop across the turbines, with each turbine blade being about two centimeters long and three centimeters thick to avoid being sheared off or fatiguing, and everything else beefed up along the way to the main combustion chamber.

>>12138939
>gun so big it has its own escalator

>>12139210
So just use a smaller load and don't fire it through an AR-15. Firing it on single-shot break action rifles should be fine I guess. Just use a bit more oxidizer than sugar and it won't leave caramel in the barrel I hope

>>12138322
Brown dwarfs form just like giant planets, and can get kicked out away from their parent system just like any other object (far more likely if the parent system is a close orbiting binary). These orphan brown dwarfs would drift around while orbiting the galaxy and now and then would have close encounters with alien star systems, and every now and then if it happened to encounter two star systems who themselves were having a close encounter, the resulting 3-body interaction could leave the brown dwarf in a distant orbit around one system while the other system inherited the momentum of the brown dwarf and was gently kicked off.

>>12139208

>The point about my post was the RD-180 can never throttle low enough to land an Atlas V.

Aaah, now I get it. If you replaced the RD-180 with the RD-191, it should be able to because the RD-191 can throttle way lower than the RD-180 (47% VS 27% for the RD-191).

>If the Atlas V was much bigger and ran on say 7 RD-180's, it would be feasible.

I would swap them with RD-191's.

>>12139192
Yeah, I'm making a more conscious effort to make my script more readable this time. All about that rapid iteration. Also the soviet space program is surprisingly interesting. Their early space station program was fucking cursed.

>>12139232
>I would swap them with RD-191's.
Well, naturally. But this was just a hypothetical thought experiment using the exact same engine to illustrate the difficulties behind propulsive landing.

>>12138478
>Hell, they could have gone for a full F-1 based first stage and the rocket would have turned out not too bad payload capacity wise.
NASA had studied several designs for SHLV before settling on SLS Shuttle-derived bullshit for bullshit political reasons. All of the Saturn V style rockets (big kerolox first stage and big hydrolox second stage, with or without a smaller but still big hydrolox third stage) completely out-performed all of the Shuttle derived launchers. IIRC they had been studying one Saturn-V style design that used oxygen rich staged combustion kerolox first stage, RS-25 derived staged combustion second stage, and J-2X hydrolox third stage. This was gonna be a monster of a rocket, easily approaching 200 tons to LEO and something like >60 tons to TLI.

>>12139240
I know and it fucking saddens me to no end.

>>12138498
>our tiny and very suborbital theme park ride that we're totally gonna fly people on any day now is going to do more unmanned flight tests
wow how will SpaceX ever recover, it's all over bros

Why do rockets have a seperate fuel+oxygen tank? Why can't you just have one tank with the two already mixed?

>>12138665
>All this regolith is yours except Tharsis; attempt no radar imaging there

>>12139248
Here's your premixed hydrolox ride, bro.

>>12139248
Mixing fuel is science by itself.
https://www.youtube.com/watch?v=aa4ATJGRqA0&t=6s

>>12139248
Different pressure/temp required for each set of fuel

>>12139248
That's what a solid rocket is anon

How come brainlets always ignore the real problem and get attached to mundane issues? I see this in all sectors/industries. For rockets, brainlets constantly focus on life support systems when talking about going to another planet/soalr system/etc instead of worrying about the propulsion/fuel. Whats going on in the minds of brainlets?

>>12139226
It will still leave lots of soot and caramel because it deflagrates so violently that chunks of the fuel are blown off as it burns up. Again, it can be done, just that it isn't used in modern weapons for a reason.

What kind of psychological effect would seeing a planet (or other destination) before arrival have on a person? Would it change their worldview compared to someone who doesn't have the same opportunity?

>>12139102
I wonder if it was a program inspired by the success of SpaceX
>Hmmm . . . hey, smallish team of 25 to 35 year old engineers, go make a plane that can do this this and this, you have $50 million don't spend it all in one place
>Result is a fighter that can beat the F-22 in 1 on 1 aerial combat, is made of tig welded steel, costs $1 million each and takes two months to go from steel on a roll to finished air frame
One can hope

Quick question: Would a gas giant like Jupiter be able to have an Earth-sized planet as a moon? If so, how many other moons could it still support?

>>12139248
https://en.wikipedia.org/wiki/Monopropellant

>>12139193
Yes I know how hydrocarbon chemistry works and what the mechanisms that lead to coking are. The reason I say "if" is because propane exists in this kind of border region of carbon to hydrogen ratio where it MAY be favorable in terms of a fuel rich combustion cycle, which is a prerequisite to allowing FFSC, which is the best closed cycle for a reusable engine because you have two entirely separate preburner-pump assemblies which are either fuel rich on both sides or oxygen rich on both sides, which completely eliminates any need for zero leak high pressure seals on rotating shafts.

Methane, for example, does not form ANY coking deposits when burned, or even when pure methane is thermally decomposed via an arc torch, because the hydrogen to carbon ratio is very high, and even if a carbon atom only has a single hydrogen attached and three unpaired valence electrons just hanging in the wind, that radical is still a volatile and doesn't deposit as carbon soot.

Kerosene DOES for coking deposits because it has a hydrogen to carbon ratio of just a bit over 2:1. This is not enough to ensure that every single carbon atom in the decomposition soup manages to hold onto at least one hydrogen atom, and even worse is the fact that with a longer chain hydrocarbon the chance that any two carbon atoms will form double bonds goes up. While C-H is a volatile radical, C2-H radicals are not, and will deposit out as well as polymerize into even longer tangled messes of carbon double and single bonds.

Propane is somewhere between, because it has a hydrogen to carbon ratio of 8/3, or 2.66. It's also relatively short, only having three carbons per molecule, so it may be less likely to form nonvolatile radicals and carbon-carbon polymers.

>>12139195
Speed of combustion is more relevant for a projectile weapon, unless you're firing gyrojets

>>12139232
>I would swap them with RD-191's.
>14 RD-191 engines
I like the way you think anon

>>12139248
Ever heard of a fuel-oxidizer detonation?

>>12139280
They want to think of themselves as smart and they have literally no understanding of anything so when they hear about an expert working at the most capable space agency in the world saying "We're building the rockets to go to Mars right now" they fire back with something they thing that engineer hasn't solved which will kill their project like "Uum sweaty, space has gamma rays" and then they sit back smugly feeling like they've successfully crabbed that engineer away from the edge of the bucket.

>>12139284
Probably. We know even seeing Earth from space has a psychological effect.

>>12139305
Yes it could if it managed to successfully capture one. It probably couldn't form naturally from the protoplanetary disc.
Jupiters tend to be extremely radioactive so the moon would probably be sterile unless the planet orbited far away.

>>12139305
Yes, and many.
The likelihood of a moon of X mass forming goes down as the mass 'X' approaches the mass of the parent planet, but it's not impossible. We know for a fact that stars of similar mass can form from the same collapsing disk of space gasses and dust, and fundamentally the process of planet formation and moon formation is the same as star formation, just with many orders of magnitude less material to begin with, and at the very small scales there are other forces involved that become significant (ie collisions between objects can throw enough material into orbit to allow for new objects to form, whereas at star-forming scale those collisions are so energetic that it kinda just sets the clock back a few centuries until the rotating ball of hot plasma cools off and shrinks a bit more back to where it was before the impact).

Anyway, the point is, we know that two objects of near-equal mass can form orbiting one another, be they two stars or two planet sized objects or two dwarf planet sized objects or even just two asteroids. That means that for highly disparate masses, such as that between a Jupiter mass planet and an Earth mass moon, there should not be any reason for that pair to be impossible to form, and therefore given the number of stars in the universe there's definitely an Earth mass planet orbiting a Jupiter mass gas giant out there somewhere.

As for how many moons can orbit a planet, just consider the Roche limit and the Hill sphere radius (more specifically, the maximum radius an orbit can have inside of that planet's hill sphere while being stable for billions of years), and then imagine placing moons of whatever mass you want to consider in orbits as closely packed as you can without having any of the moons' gravity becoming significant over the strength of gravity from the parent planet at that distance. In layman's terms, you can pack moons closer together the closer you are to the parent planet.

>>12139362
>Jupiters tend to be extremely radioactive
Inaccurate statement.
Jupiter-sized planets tend to have powerful magnetic fields which can trap and hold a lot of high energy electrons and charged atomic nuclei from the Sun, which builds up radiation belts which pose a radiation hazard.
That is to say, the magnetosphere of a planet acts like a large particle accelerator with a very wide, low energy beam vaguely shaped like a donut. Jupiter itself is actually significantly less radioactive than rocky planets like Earth, because all the heavy radioactive atomic nuclei have sunk and are buried under thousands of kilometers of liquid hydrogen.
Also, due to the nature of the radiation in Jupiter's magnetic field, the primary radiation only requires mere centimeters of shielding to completely block. It's effectively just low energy beta radiation and low energy proton radiation, and even the highest beta or proton radiation interacts too strongly with matter to pass through more than ~10 cm of plastic. The actual radiation hazard for manned spacecraft around Jupiter would be the bremsstrahlung x-rays produced when beta radiation encounters matter with a high proton count per nucleus, ie steel or lead or tungsten etc. X-rays are much more penetrating and more troublesome to stop, meaning the vast majority of shielding requirements are simply to attenuate those X-rays, whereas the primary radiation is basically a non-issue.
The main point is this; if we had materials that could fully block beta and protons without producing bremsstrahlung x-rays, Jupiter's radiation belts would be no hazard at all. Since we don't have those materials, we'd need about 8 to 12 meters of water (or any other material in the thickness required to get the same mass-density value) to fully block all radiation. As a bonus this would block all cosmic rays, too. If an earthlike moon around a gas giant had an earthlike atmosphere, the surface would be fully shielded.

>>12139248
>premix Hydrolox
tank explodes, and you make water
premix rp1 and Liquid oxygen
You get Kerosene snow, possibly an explosion

>>12139454
>You get Kerosene snow
No, you get conspiracy theories about space mice.

>>12138045
How much do you put into LEO

>>12139283
>Again, it can be done, just that it isn't used in modern weapons for a reason
Because they already have smokeless gunpowder?

I need to concoct a solution to burn r-candy in my apartment without anyone noticing

>>12139463
I love that one.
>an all-powerful near-omnipresent cabal has taken over the world and has fooled everyone that space is real
>somehow they can't be assed to clean their fake space movie sets

Looks like Boca Chica will be spared.

>>12139485
>LISTEN TO THE LYRICS OF THIS RED HOT CHILI PEPPERS SONG THAT IS TOTALLY NOT ABOUT THE SCI-FI SHOWS BEING MADE IN HOLLYWOOD!

>>12139492
>((KUBRIK)) HAS MADE AN AMAZING SPACE MOVIE THEREFORE SPACE CAN BE FAKED FLAWLESSLY!
>WAIT WHAT DO YOU MEAN THAT 2001 IS FULL OF FLAWS?

>>12139486
Once again.

I have no pity for retards who get their stuff destroyed by hurricanes. You’re a dumbass shitbrain if you decide to live somewhere you know for a fact is hit by hurricanes periodically

>>12139358
It will unspook astronauts like the little blue dot did, say goodbye to your dreams of racism and capitalism on mars.

>>12139538
In-group biases are natural and unavoidable. Sorry Jew

>>12139538
Are you implying that seeing a planet from space will turn people into authoritarian psycopaths?

>>12139538
Max literally who?

>>12139463
/pol/ is fully of retards posting vids from SpaceX clips showing "mice" falling off the nozzles and it just makes me cringe

>>12139410
I never knew this shit

MIKE NOOOOOOOOOO

>>12139584
He should learn to keep his power level down a bit better, just so media don't jump on his throat for being redpilled and tainting his drive by association

>>12136476

>>12139584
>EM drive works, but is cancelled because of reeeecism

>>12139589
Needs gridfin Yotsuba.

>>12139584
mike is a trip, but at this point he doesn't matter if the tech works.

>>12139584
Wow a fraud shilling for his pseudoscience and a fake gadget is actually a crazy racist retard, what a twist.

>>12139584

>>12139614
t. Lysenko

>>12139614
nothing in that post was racist

>>12139614
What if I like black people, and also like white people?

>>12139614
Being racist is smart

>>12139614
>racist
You decide what race he was talking about, which also defines what is racist to you

>>12139568
there is a good space thread on /pol/ right now surprisingly

extremely based

>>12139667
Pretty based I gotta say

If he turns out to be right about QI, people will be asking, what else is he right about?

the brit on NSF seems smart,but i keep expecting him to start shouting "SIX A BONG GUVNAH"

https://www.abc.net.au/news/2020-09-19/australias-first-private-rocket-blasts-off-from-koonibba/12681258

upsidedownlanders are making a move, trying to catch up to the kiwis no doubt

>>12136485
Anyone have the original?

>>12139682
that's Chris Bergin, he owns that site
all the paypiggy money goes straight to him

>>12139733
Elon's twitter

>>12137588
Where can i get something like that

>>12139744
ty