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2 votes
1 answer
150 views

What conferences have technical sessions that cover credible and transformative alternatives to chemical-rocket-based launch?

4 votes
1 answer
552 views

Methane or LOX tank at Boca Chica

7 votes
2 answers
2k views

Diagonal ice tunneling rover to reach a safe pressure in Mars?

4 votes
0 answers
83 views

Space Shuttle development book recomendation

0 votes
1 answer
177 views

What is an feasible atmospheric pressure for plants and humans on Mars?

7 votes
1 answer
333 views

Why don't rocket engines use heat tiles on the inside?

2 votes
1 answer
54 views

Can any electric rockets utilize in-situ asteroid materials as reaction mass?

6 votes
1 answer
231 views

Are there any video/audio recordings of the launch of Sputnik 1?

2 votes
0 answers
62 views

Could a planet only support underwater life?

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1 answer
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Question about some engineering solutions in control moment gyro ECP Model 750

9 votes
5 answers
5k views

What are the advantages and disadvantages of using either liquid hydrogen or liquid methane based rocket fuels?

2 votes
1 answer
89 views

How to find the velocity vector of a planet in orbit argument of periapsis or longitude of the ascending node?

4 votes
1 answer
59 views

Most likely trajectory of the Gravity Probe A spacecraft, and location of the microwave maser receiver on Earth?

27 votes
2 answers
2k views

Function of the separated, individual solar cells on Telstar 1 and 2? Why were they "special"?

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