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SE - stop firing the good guys
  • Member for 9 years, 1 month
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7 votes
1 answer
135 views

Trivial lower bounds for single point mass delta-v problems?

7 votes
2 answers
164 views

Can I observe a Venus transit before 2117 from a spacecraft in the Earth-Moon neighbourhood?

7 votes
2 answers
389 views

Cosmonauts and Astronauts

7 votes
1 answer
338 views

What is the problem with pressure?

6 votes
1 answer
391 views

What specific impulse can I expect from iron powder produced from lunar regolith?

6 votes
1 answer
220 views

Can I move the ISS for free?

6 votes
2 answers
292 views

Legality of nuclear debris field on the Moon?

6 votes
1 answer
85 views

Important new additives to hypergolic hydrazine-based fuels since 1972?

6 votes
1 answer
722 views

How close do gravitational 2-body hierarchy levels get?

5 votes
1 answer
97 views

How do orbits around Jacobi ellipsoids behave?

5 votes
1 answer
320 views

Why is the gas giant grand tour interval 175 years when the synodic period of Uranus and Neptune is 171 years?

5 votes
1 answer
215 views

What does a low thrust apoapsis raising look like?

5 votes
2 answers
203 views

Orbital insertion with "inertial parachute"?

5 votes
0 answers
162 views

When, if ever, did deep space probes start using encryption?

4 votes
0 answers
209 views

What do the RD numbers of Russian rocket engines mean?

4 votes
1 answer
295 views

Under what conditions can a non-resonant satellite stay hidden from an observer on the ground?

4 votes
1 answer
113 views

What is the shape of the envelope of all orbits with velocity of equal magnitude at their intersection?

4 votes
0 answers
89 views

Telescope in a crater? How different are the bowl shapes?

4 votes
0 answers
37 views

Can Tisserand's parameter be modified to correct for perturbing eccentricity?

4 votes
0 answers
155 views

What is the specific compression strength of an orbital tower structure?

4 votes
1 answer
1k views

What was the Apollo service module propellant used for on the LEO missions?

4 votes
2 answers
1k views

Saving delta-v by splitting plane changing manoeuvre?

4 votes
2 answers
673 views

A constant parameter in a three body system?

3 votes
1 answer
196 views

When is the PTK NP spacecraft likely to be launched?

3 votes
0 answers
334 views

What is the total mass of everything launched that are still in space?

3 votes
0 answers
138 views

Delta-v cost of longitudinal plane change correction?

3 votes
1 answer
405 views

What are the shortest orbital periods used for their repeat ground track properties?

3 votes
1 answer
214 views

Have capsule-free taxi spacecraft ever been seriously considered for non-emergency use?

3 votes
2 answers
251 views

Lunar landing in cotton candy?

3 votes
1 answer
173 views

Can I push the atmosphere out of the way?