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Matthew Christopher Bartsh's user avatar
Matthew Christopher Bartsh's user avatar
Matthew Christopher Bartsh's user avatar
Matthew Christopher Bartsh
  • Member for 3 years, 1 month
  • Last seen more than a month ago
17 votes
3 answers
2k views

Can you throw a stone into longterm orbit from the surface of a spherical planet if it has lumpy enough gravity?

14 votes
3 answers
1k views

Is there an intuitive reason for why the shape of the orbit at perigee is the mirror image of that at the apogee?

8 votes
3 answers
2k views

What is the density of the earth's atmosphere at an altitude of four hundred kilometers?

6 votes
2 answers
211 views

Why did the Mir space station need someone to look after it at all times?

6 votes
2 answers
853 views

What is a gravity gradient?

6 votes
1 answer
173 views

Is there a very light material that could deorbit without burning up?

5 votes
2 answers
265 views

Are there any satellites in geosynchronous orbits that are neither geostationary nor 'wobbly geostastionary' (figure of eight geostationary)?

5 votes
1 answer
229 views

If a Space Shuttle tile deorbited on its own, what percentage of it's mass if any would remain in one piece until it reached the surface of the earth?

5 votes
2 answers
176 views

Has anyone suggested using an electrically powered sling or centrifuge mass thrower as a form of electrically powered spacecraft propulsion?

4 votes
1 answer
265 views

What does 'a nudge' mean in the context of rocketry?

4 votes
2 answers
496 views

What are the average masses of male and female astronauts respectively?

3 votes
1 answer
171 views

What is the acceleration in an orbit decaying due to air resistance relative to one not decaying?

2 votes
2 answers
137 views

What is the temperature of the atmosphere at the height where meteors burn up and does that temperature significantly help cause the burning up?

1 vote
3 answers
480 views

Why do we never see astronauts doing breaststroke or the "Man from Atlantis" swimming movements, say, and thus swimming in air in free fall?

0 votes
2 answers
604 views

Using a sling whirled around above the head, could someone on the moon throw a stone into orbit?