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uhoh
  • Member for 6 years, 11 months
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  • Taipei, Earth
18 votes
3 answers
24k views

How to calculate delta-v required for a planet-to-planet Hohmann transfer?

  • 3,950
17 votes
2 answers
11k views

How to calculate Delta V for lunar flyby

  • 16.1k
17 votes
1 answer
2k views

What are these enclosed regions on the Mission Control Center map?

  • 1,285
17 votes
5 answers
23k views

Cubesat Launch Costs

17 votes
1 answer
5k views

What are quaternions and how are they used to represent spacecraft dynamics?

  • 65.9k
17 votes
4 answers
19k views

Why are photos of satellites most often computer generated?

  • 311
17 votes
1 answer
1k views

Is the difference in orbital velocity of different parts measurable on board the ISS?

  • 2,403
17 votes
2 answers
3k views

Why did Sputnik 1 have four antennas?

16 votes
3 answers
520 views

How would time measurement be done over great distances?

  • 303
16 votes
2 answers
2k views

What software can be used to determine deep-space trajectories?

16 votes
3 answers
442 views

How is RF spectrum usage coordinated in Mars orbit?

16 votes
2 answers
5k views

Why did the Space Shuttles perform a rollover maneuver during launch?

16 votes
3 answers
14k views

Can you swim in space?

  • 262
16 votes
1 answer
653 views

What are the differences in technology between OSIRIS-REx and Hayabusa missions?

  • 2,107
16 votes
4 answers
14k views

Why do so few satellites pass over the poles, and why do so many focus on the equator?

16 votes
2 answers
5k views

How are GPS satellite clocks synchronized with each other in the earth's frame of reference?

16 votes
2 answers
2k views

Is the Falcon Heavy booster much simpler to land than the Falcon 9 first stage?

  • 2,403
16 votes
1 answer
755 views

What would have been the absolute maximum LEO payload of a two-stage Saturn V?

16 votes
5 answers
2k views

Jurisdiction over crime in space

16 votes
1 answer
578 views

Is radiation dose from cosmic rays higher behind 50 cm of shielding, or lower?

  • 20.9k
16 votes
3 answers
2k views

Why would a mission to Sun-Earth L1 have an instantaneous launch window?

15 votes
2 answers
2k views

Can the satellites in Martian orbit be put to use providing a rudimentary GPS system on Mars?

  • 13.6k
15 votes
1 answer
716 views

What amendments were made to the Outer Space Treaty?

  • 13.6k
15 votes
2 answers
31k views

Calculating solar system escape and and sun-dive delta V from lower Earth orbit

  • 996
15 votes
1 answer
928 views

How did Goddard's rocket reach 41 feet altitude in under 2.5 seconds?

15 votes
3 answers
2k views

Cubesats in lunar orbit and beyond - how does communication work?

  • 6,561
15 votes
6 answers
26k views

Can an artificial satellite stay in orbit forever?

  • 253
15 votes
2 answers
2k views

How were vibrations supposed to be handled in an Ares I?

  • 6,561
15 votes
2 answers
6k views

Are rocket exhaust flames ever opaque?

  • 17.2k
15 votes
2 answers
1k views

If we could send an orbiter to the Pluto-Charon system, could we put it in a stable orbit?

  • 20.9k
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