/sci/ - Science & Math

>>10299793
What about an archive containing all /sci/ threads?

>>10299793
How feasible is it to send a small object into space? I'm a brainlet and don't know much about physics.

It would be fun to send Japanese otokonoko hentai into space. I wonder what the space aliens will think when they find it.

>>10299794
We could fit it all onto a golden cd or something.

>>10299806
Would the coolness of the atmosphere cool it off as it rises? only if it was in a part of the world that was closer to night and away from the sun right?

>>10299806
People send up cube satellites all the time.

>>10299809
>We could fit it all onto a golden cd or something.
Or laser-etch it into a crystal.

>>10299838
>People send up cube satellites all the time.
How much money does it cost? Can a bunch of losers afford it? Also, I'm not talking about satellites; I was thinking about shooting stuff off into outer space. Would that be more expensive or about the same?

>>10299838
> laser-etch

We could 3D print it already engraved to the crystal unless some anon has the power to engrave a crystal.

>>10299846
Escape velocity is more expensive in both energy and therefore resources. So yes.

>>10299850
>Survives reentry.
>Lands on an exoplanet with intelligent life.
>They decode it.
>Find how shitty human humor is.
>Send a relativistic sabot to BUTFO.

>>10299852
This
Why is OP even posting if he hasn't even passed first semester physics?

>>10299852
> flammable substances
> tubes
> pressure
> filter of filthy excess grime
> exceed ozone
> exceed orbit
> goal met
> release filthy rock of black burnt tar from flamable substances into space
> we've reached our goal as well as formed a new asteroid that will be mined by Trump in 2021 for shitty metal
> /sci/ deemed by science text books as creationists of new life and exploring space

>>10299793
>>polaroid camera
fucking why? Why a FILM CAMERA of all things?
>>We just need to break 99.7793 km to reach the low orbit and touch the land of no return.
that's not how orbit works at all. Getting high is not that important for getting into orbit, getting fast is much more important. Building an orbit capable rocket is totally out of reach for amateurs. Suborbital amateur rockets have been demonstrated, but that's about it.

>>10299930
We're sending an object within a square foot, not a person, not a probe, not a drone, not a satellite, not a robot, an object because we can.

>>10299999
we cannot.

>>10299793
We need about 9.4 km/s of delta v, but that shouldn't be too hard if it's just a Polaroid. Not sure about the legality or what we might use for feul though. If you really want this to happen, make a discord to group interested parties instead of a thread that's gonna die in the next hour.

>>10300037
>> 9.4 km/s
>>shouldn't be too hard
yes, obtaining 9.4 km/s is going to be hard.

>>10300044
>hard
Only if you're bad at KSP.

>>10300055
This is real life.

>>10300055
KSP isn't like real life.

>>10300059
>>10300064
You're right, samefag. But the same principles apply. If thing go up and sideways very fast, it goes to orbit.
Don't overcomplicate it, it's not rocket science or anything.

>>10300090
>>sideways very fast
it's not easy to make something go very fast. The rocket equation says that in order to go very fast, you need a pretty big rocket. In fact, the mass ratio increases exponentially with required delta V. Mass ratio is the mass of rocket without propellant/mass of rocket with propellant. You need literally tons of rocket to get into orbit. It's hard to obtain literally tons of solid rocket fuel without the government taking notice. Or for that matter, getting tons of solid rocket fuel into the right shape for engines.
https://en.wikipedia.org/wiki/Tsiolkovsky_rocket_equation

>>10300020
But see that's where you're wrong.

>>10300037
I'll get into filling this up with info in a bit
https://discord.gg/6QVBsZ

>>10300138
Yeah but update us in the thread for those not wanting to join discord

Is it in orbit yet?

>>10301491
we're getting there. . . .

>>10299793
For a while the goal was to send a frog to space but the project eventually fell apart.

>>10301642
well we're making progress. Updated from the discord, we have someone who can engrave the crystal.

How much would it cost to put the payload onto an electron rocket?

Also we should just put a phone inside a heated box attached to a high gain antenna. Phones are cheap and have lots of instrumentation.

>>10301715
a basic phone connected to a small solar charger maybe?

Just helium balloon and then ignite the rocket at really high altitude. It wont need to be much larger than a meter or so

>>10299999
checked, we must send something into space now

What could be the possible sources of funds? Of course, the amount necessary will depend on our approach, but where could we get the money (anon donations, convincing Musk to sponsor us, etc.)?

Hydrogen balloons are a cheap way to gain some altitude.
In this webm, a condom is inflated with a US ration pack heater in a water bottle.
https://i.4cdn.org/wsg/1546742523177.webm

>>10299793
We could launch small creatures under party balloons, as a start.

People float stuff that high with balloons all the time. It's absolutely doable and not that hard.

We could probably raise the ~$200k to build and launch a cubesat but I can't see us doing anything interesting with it.

>>10299793
t. Someone with no idea of how orbital mechanics works

>>10300044
>>10304006
how bout a rocket mounted on a weather balloon, how far can we get with that

>>10303766
we can work with a microwave to emit some radioactive signals back at us. we can use it like sonar to give us coordinates on what the signals hits and where. we would need to also have a receiver of some sort though.

>>10302133
Yeah, rockoons are a thing.

So the common idea so far is to use balloons to get the rocket to a certain height an launch out of orbit.

>>10304430
It's not going to make much of a difference. A weather balloon does not add any speed.

>>10305713
it doesn't add speed, it saves distance we need fuel for.

GOD SUPPORTS THIS! LET 4CHAN APPEAR IN THE NEWS AS A COMPARISON TO NASA!

If anonymous fucktards from 4chan can achieve it then 4chan officially becomes a culture people can proudly identify with.

>>10305721
you need SPEED not distance.

>>10305820
We drop the rocket form the balloon and take advantage of the velocity from the fall with a small bit of fuel to create an arch so that it will propel up again.

>>10299793
Will 4 leaf clover be what's engraved on the crystal?

>>10305977
Launching from a balloon decreases the initial air resistance and saves fuel. That's the main benefit. Decreased distance has little effect also, letting the rocket drop down increases speed in the wrong direction.

>>10305738
Lwts write fuckin history again

>>10300138
Make it permanent i cant join

>>10306134
https://discord.gg/NgrvWQd

>>10305738
This is the point, anons don't understand the power we have at our fingertips.

So, so far we have two possible approaches:
>launching a rocket from a balloon
Difficult, but more fun
>crowdfunding a cubesat.
Easier, but dull

Which one do we choose?

You would need an absolutely massive balloon to lift an orbital rocket, and even if you managed to do it the cost and complexity would outweigh the advantages. It would be cheaper to just build a bigger rocket on the ground.

The only realistic option for amateurs to get an object into orbit is to crowdfund and buy a payload slot on an existing orbital rocket. A ticket to launch a cubesat is around $50k, so crowdfunding one is feasible.

Also if you want to put something in space to last like a memorial you're going to need to go a lot higher than 100km or it will just deorbit and burn up due to atmospheric drag in a few weeks/months.
Getting a cubesat higher the low orbit could be tricky though. The whole idea with cubesats is that they deorbit within a relatively short time so there's no worry of littering. Putting something into high orbit where it could stay for hundreds or thousands of years has more red tape.

harness the souls of black people and use forbidden jew magic

>>10309041
>The whole idea with cubesats is that they deorbit within a relatively short time so there's no worry of littering. Putting something into high orbit where it could stay for hundreds or thousands of years has more red tape.
This, high earth orbit is a must.

>>10309041
In today's age everyone crowdfunds everything. We would need to make some 2 minute video on how " Space isnt just for the rich, It's time for normal people to get into space to!" And people will probably donate like hell.

Send Pepe to space!

>>10299999
SPACE PENTS

/sci/ MUST SEND A DILDO INTO SPACE

FOR ALL MANKIND

Is there someone here smart enough to do some back of the envelope calculations in regard to sending a 1lb object into space?

Could we just strong together a ton of model rocket motors in such a way as to allow them to continually thrust until our rocket is in space?

>>10310137
>bring first stage as high as possible on small platform using weather balloons
>ignite engines at 30k feet
>rocket has small spikes to pop overhead balloons on launch


Is it possible bros?

>>10310157
Weather balloons like this one https://www.amazon.com/30ft-Professional-Weather-Balloon-1200g/dp/B00513FWQI

Are easily capable of reaching 100000 feet. At that altitude air resistance should be negligible. We'll still need the same delta V tho, but when launching from a balloon at that initial altitude we won't have to worry about drag that much.

>>10299793
Once the JWST inevitably misses it's next launch date and congress demands action, this is what will fly in its place

https://en.m.wikipedia.org/wiki/Russell%27s_teapot

>>10299999

>>10301710
It won't cost much if we use free electrons, because they're free!

>>10311252
it's a plan.

This a thought that popped into my head, to save fuel and add to the balloon, what if we have a large object holding the fuel rocket/ship/ ect that it would launch out of at a certain height when the balloon has reached it's appointed height? this would allow us to avoid wind interference so that we have a windshield in the holding object and the launch can be a straight shot from x height.

the holding object would need to be taller though with a wide base to hold it's angle long enough.

>>10299999
How dare you waste quints like this.

>>10313807
If the balloon rises high enough, the atmospheric winds will have very little effect. If we can raise the rocket above 18km (weather balloons can easily reach 30km) we'll be above most of the atmosphere and the rocket will be kept pointing upwards by gravity.
Here are a few proof-of concept examples:
https://www.youtube.com/watch?v=DMYR-15EVOI
This one's a launch by a company, named Zero2infinity (https://www.iflscience.com/space/a-company-has-launched-a-rocket-from-a-balloon-for-the-first-time/).). As you can see, the main issue is that a balloon gets a slight spin while rising through the atmosphere.

Here's another video showing a similar launch from a much lower altitude:
https://www.youtube.com/watch?v=q3KI3hIyaIU

In both cases atmospheric winds seem to have very little effect on the orentation of the rocket before launch. Anyway, our first step should be to build a small test model using a small weather balloon like this one https://www.scientificsales.com/8238-Weather-Balloon-350-Grams-Natural-p/8238.htm together with a small model rocket, carrying a dummy payload. With this we might be able to convince other anons to give up their neetbux so that we can go bigger and higher.

>>10299793
lets convince a full blown autist to send him into space via strapped to a chair

>>10300110
use an ion thruster powered by PV or solar wind

The thought of having /sci/ in a seat at the UN is too good to pass up, when there's a crowdfunding open I will definitely be putting my paychecks into it

>>10316332
That's probably going to be a court trial at the UN rather than a membership.

>>10316264
Ion thrusters do not have a thrust to weight ratio more than 1. And that's when they're operating in a vacuum.

>>10316462
We could always buy a $20 plot on land in Kenya or Northern Greenland and call it a country so that we can identify as a nation and nation's space federation without the trouble of going to court.

An idea crossed my mind, I will admit probably ridiculas but could get us somewhere.

What is light? Light is one of the fastest known ____ to man, can we somehow convert material to light while still maintaining to recreating structure?

> light must hit something to burn and form a new substance.

in such case would it be more optimal to somehow send a tiny circuit and light receiver into the orbit and then hit it with a strong force of light to then make something? That would require one fuck of a laser pointed and scope that would probably blow us up in the process. Perhaps we can somehow place something within the light that would be pushed? The only substance I can think of that may be able to maintain such heat would be some sort of crystal however.

Ideas that I needed to get out there.

>>10316743
Yeah it's totally possible. You don't even have to convert matter to light first, you can just use light to make energy. You see according to E=mc^2, energy can be converted to mass. In practice, in order to make matter from light you have to make antimatter too, so the conversion rate isn't very good. It's wildly impractical to do this to make a satellite in orbit, the energy requirements would be phenomenal, probably much more than the entire energy usage used by mankind in a year.
https://news.umich.edu/theoretical-breakthrough-generating-matter-and-antimatter-from-the-vacuum/

>>10316587
>90,000 meters per second (over 200,000 mph). In comparison, the Space Shuttles can reach speeds around 18,000 mph

>>10316920
I'm guessing you posted the exhaust velocity of some ion drive then? That's different from the thrust to weight ratio. If the thrust to weight ratio is less than 1, you can't get off the ground. I'm guessing you're next going to propose throwing it on an suborbital trajectory and using the ion drive to provide the necessary kick to go into orbit. Not happening, the drive won't be able to impart enough delta V to not hit earth before falling back down because of the low thrust they produce.