/sci/ - Science & Math

>>11249921
Do you really think a YouTuber came up with the idea?

>>11249929
Do you think I do?

>>11249921
theoretically, but you need to build a dyson sphere first

>>11249921
A literal professor of astrophysics designed that engine amd published a paper about it. But this could only be built by a type 3 civ.

>>11249939
What do you think I think?

By the time you have enough resources to construct a stellar engine, you also have enough resources to no longer ever need a stellar engine.

Can someone explain to me why a Shkadov thruster would work? Why would the star and the mirror/ sail move?

>>11249929
They literrally said in the video that they didn't

that idea is so fucking stupid

>>11250151
In OP image it seem like a waste of time/money if you're a type 3 civ. , most likely they will have something like a Warp Drive or maybe wormholes/instant teleportation to a destination .

>>11250214
The idea is sound, if you don't understand it you are the stupid one. It's based on current knowledge though so by the time a civ is building dyson spheres they would probably have better alternatives.

>>11250151
actually this is type 2 civ technology

>>11250161
So it'll be more of a hobbyist thing then, got it

>>11249921
>>11250151
>>11250086
No, not even in the slightest in any way. Their physics are so fucking broken they couldn't make a pogo stick work. Fucking popsci & grant farming theoretical """"""scientists"""""" are degrading real science and real physics.

>>11250151
Type 2

I think it's unlikely the entire solar system holds the raw material necessary to construct such a thing.

>>11250626
some guy did some math for a Dyson Sphere, we don't have the raw material in the entire solar systerm to build something like pic related to cover the entire Sun, we will need to destroy entire solar systems and then bring the materials here, but we have for a Dyson ring or Dyson swarm.

Explain why we aren't seeing ANY signs of type 2's and 3's, /sci/. I'm not talking about signals or even suspicious IR excess lets assume the fuckers recycle even that.
>no stellar graveyards
>no "grazed fields" of consumed resources
>no voidspots of "nothing to see here move along now"
>no signs of artificially induced destruction from wars ie supernova hotspots or other weird "nuke crater" equivalent things in space

And don't tell me they all hide because muh star trek prime directive. That's fucking impossible. Even if most do at least one fucker somewhere will be stupid and brave enough to go out of his way and grab attention and we aren't seeing SHIT it's fucking EMPTY out there.
>inb4 teletubby's star

>>11250835
Perhaps an interstellar mistake kills everyone before they can fully unleash their potential? Pic related

>>11250835
Because space is so incomprehensibly large.

>>11250749
dyson swarm IS a dyson sphere
the solid shell idea is the product of some fuck muppet media personality

>>11250151
kardashev scale is bullshit, dyson structures are blatantly unscientific (other than possibly a very watered down iteration of the Dyson swarm)
practically all of the "theories" surrounding the growth of interstellar civilizations (that we have no proof even exist) are entirely bullshit

>>11250835
the Booty void
>inb4 le it isn't actually empty like in pic it's just le sparse, silly xD
Guess a civilization clever enough to recycle their waste heat would also be careful enough to not leave huge empty void and rely on plausible deniability.

Why wouldn't the sun just blast the shield away?
Why would the sun move with it?

>>11251338
>Why wouldn't the sun just blast the planets away?
>Why would the sun move with them?

>>11250835
There are some voidspots in the universe anon, like the Bootes void, Giant Void, CMB cold spot etc. The only reasons we don't see any life or graveyards and no sings of artificially things is because the distance is too fucking big in the universe, pic related, that's only the Milky way, there are estimated to contain 100–400 billion stars in this galaxy alone. So if we really want to find life and conquer this galaxy, we need FTL travel.

Does anyone else find it embatassing when Popsci fags start going on about interstellar travel? These manchildren are so fucking uneducated that they don't realize even our nearest galaxy is MILLIONS of years away traveling AT C.

Why are popsci fags so fucking illiterate? We will never discover other advanced life in the universe because the universe is incomprehensibly big. Even our own neighborhood, the milky way, is so incredibly big that we'd be lucky if we explored just 1% of it.

Interstellar travel is a pipe dream. Intergalactic travel is literally impossible. This is why there is zero evidence of type 3 or 4 civilizations.

>>11251350
Not him but I have the same question as his first one.

The shell is much closer than the planet's, so what keeps it from being blown off?

>>11252283
> man flying is literally impossible
> man walking on the moon is literally impossible
> Trump as president is literally impossible

>>11252343
pic related it's you

>>11252244
Brainlet post. Advanced civilizations would operate on the timescales of millions of years. So you do not need FTL to spread all over the galaxy, just lots of time, of which there is no shortage. And such civilization should likely be visible right now, assuming they build any Dyson swarms or megastructures that alter the light of stars. Heck, they ought to be right here by now if they are from this galaxy group.

>>11252336
>The shell is much closer than the planet's, so what keeps it from being blown off?

https://en.wikipedia.org/wiki/Statite

>>11252336
>>11251350
The way i understand is that there's a valance between the sun pulling the shield with gravity and the photons pushing it away.

>>11252361
Thanks fren

>>11252356
or it’s just not feasible to support a mega society due to communication and transport problems

>>11250835
If anything it points to the existence of God , there are so many habitable planets and the universe is so old yet still we're the only sentient species ? That means we're special right ?
If we ever find aliens then it will only be one species and their name would be djinns and they would be the other sentient lifeforms that Muhammad (pbuh) used to talk about.

>>11252356
>Someone is attacking our colony on planet X210 sir, we have to send reinforcements, but the planet X210 is 1000 light-years away, but it will takes us 10,000 years to get there
and your empire it collapses in a few hundred years, good job faggot. As a advanced civilization with an empire which spreads across hundreds of solar systems you can't survive without FTL transport and communication .

>>11252928
>>11252393

You are assuming there has to be some centrally controlled empire, but that is not the case.

>>11249921
Yes.

God of Time approved!

https://www.youtube.com/watch?v=16W7c0mb-rE

4chan Hivemind Override.

All Alpha units, disperse to teach and train.

Our battle is the ego of the old vs the intellect of the youth.

You are those that can never be judged, you are those that should have never needed saving, you are those that all covet and desire.

>>11252928

Well empires prey on the weak, so as long as you are above the rest, and you don't mind ecological collapse and genocide, you can get away with it as long as you have the edge.

>>11252928
By the time they know the colony was attacked they would be 10,000 years too late.

>>11249921
>kurtzgesagt
This shit again

>>11252283
Based

>>11249921
>Kurzgesagt
>https://www.youtube.com/watch?v=h6fcK_fRYaI

>see kurzgesagt in trending videos
>absolutely mundane SFIA sub-topic
>guess I'll head over to /sci/ to watch some smooth brain fuckery on the topic
>first attempt at rational thought includes describing a dyson swarm as a "dyson sphere"
>mfw

>>11250845
Is m that moonman from deadspace3

>>11250322
>tfw born too early to play interstellar golf

>>11252349
NPC brainlet detected

>>11253595
see
>>11251154

>>11254493
See
>>11253595

>>11252283
What about worm holes bro

>>11252283
zero IQ post

>>11252343
>if traveling higher than C is impossible how did trump win the election

>>11256041
>he thinks you need FTL
how are you able to breathe unassisted

>>11254519
there is zero proof that spacetime does pic related or that another universe exists "bellow" ours.
according to all available evidence black holes are just so dense that light can't escape it for some reason

>>11256079
wrong pic

A well founded idea for future space exploration!

>>11250151
How about we just all agree that the concept of type 1, type 2, and type 3 civilizations is fucking retarded.

>>11256131
TYPE [math]pi[/math] CIV CHECKING IN

>>11251331
>recycle waste heat

do you even entropy yet?

>>11252405
>That means we're special right ?

wrong

>>11252949
you mean intergalactic space communism?

>red-shift

>>11256060
you are legitimately retarded. the closest habitable planet is 12 light years. the fastest speed achieved by humans is 0.0037% C and that wasn't sustained for a long period.
the biggest challenge to any speed that wouldn't take millions of years is energy. the amount of energy needed to accelerate only 1 kg of mass into only 1% of C in total vacuum (true vacuum doesn't exist) would take around 9^12j. if you still can't see the problem with this, the most energy dense feasible energy is uranium-235 which produces 8^13j per kg which is 305kg surplus per kg of uranium, add in the weight of the reactor, the ship, etc and i guess you can see what is the problem. that is a perfect scenario and in reality it's way worse than that.
other forms of energy? antimatter is impossible to contain, it's impossible to transform mass into energy, it's impossible to have 100% efficiency, there is no negative mass or energy meaning Alcubierre drive is impossible, uranium is limited and all of the new discoveries being made are proving that it's more difficult than we imagined.
go back to jerking off to rick and morty or whatever scifi shit you like

11256252
Dunning-Kruger/10

>>11249921
Retarded sci-fi cancer. A metallic object of that size and mass will collapse into a sphere due to gravity most likely becoming a neutron star or a black hole. Also, that image isn't anywhere near the accurate scale of the solar system. The Sun comprises 99.86% of all matter in the solar system.

^
bait this low effort doesn't deserve a (You)

>11257045
You wish I was baiting. Take your retarded sci-fi nonsensical concepts and shove them back into where they came from.

No, the numbers don't add up.
the sun weighs 1.989 × 10^30 kg and it produces 3.86 x 10^26 joules, not to mention the amount of resources needed.
why is it so hard to understand the unbreakable limitations of physics? you can't just get energy out of nowhere

>>11257144
>why is it so hard to understand the unbreakable limitations of physics?

Popsci fags think science and technology are magic that can do miracles. There is no ''impossible'' to such delusional minds.

>>11256442
Says the anon whose knowledge of science comes from YouTube popsci channels

Why has /sci/ become infested with popsci bullshit recently? Is it the newfags coming in, or is it the channels themselves shilling here?

yes i've tried it

>>11257250
>recently
Welcome to 4channel, tourist.

>>11252283
>Does anyone else find it embatassing when Popsci fags start going on about interstellar travel?
>These manchildren are so fucking uneducated that they don't realize even our nearest galaxy is MILLIONS of years away traveling AT C.
Did you meant intergalactic travel?

If humanity is anything to go by, I think an intelligent species will tear itself apart long before developing this kind of technology.

>>11256131
It's actual sci-fi shit, it's an arbitrary metric

>>11250626
>>11250749
Couldn't you build a partial dyson sphere and bootstrap from there?

>>11252283
Potentially viable interstellar designs have been around since the 80's, retard

>>11259284
no it's not. the closest star is 4 light years away retard

>>11250835
The universe is really big

We haven't gone very far (voyager 2 only recently left the solar system)

We can't see really far away worlds in any huge detail so everything we know about them is through logical deduction

>>11256131
They are based on energy usage but a Type 1 civilization could use the energy of a planet's core which is already insane.

>>11250174
basically this only magnetism is gravity and the arm is radiation pressure

>>11249921
Why don’t you try it and find out

>>11250158
Not OP but I think you're a pseud faggot haha

>Need FTL in a hurry?
>Take two blackholes
>Pour nickle-iron into the accretion disks
>Tape accretion discs to metal bars on your spacecraft between them
>The metal will spin very fast, creating a dynamo effect and magnetic fields
>The black holes will fall towards each other, the magnetic fields will repel eachother
>Sail inbetween them for infinite ftl travel
>Have fun exploring the universe

bump

>Kurzgesagt
stopped reading right there

>>11256079
Yes. IMHO it gets even more obvious when you look at mathematics from where that idea came.

The equation has negative and positive solution. That doesn't mean there is universe on the other side. That's just physically irrational mathematical artifact and more likely has much more simpler physical manifestation.

A simple equivalent is light bulb. It doesn't matter what direction you pass the current trough it, it always outputs the same positive power. So even if P=U*I and due to your topology I=-1A it's physically irrational to speculate that the bulb will produce negative power and e.g. consume light.

>>11249921
>shipstar

>>11249921
Not science or math. We need a >>>/sci-fi/ board.