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PearsonArtPhoto
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38 votes

How did NASA achieve their live TV broadcast in 1969?

37 votes

If there's nothing special about Pluto, why was it discovered so early?

37 votes

Why was Venus rather than Mars targeted for the first interplanetary landings?

37 votes

Why wasn't an RTG used on the Juno spacecraft?

37 votes
Accepted

Is it possible that Curiosity Rover measured its own methane or failed doing the spectrometry?

37 votes

Without the accident, would Apollo 13 still have been the farthest crewed mission from the Earth?

36 votes
Accepted

Why does NORAD make TLE data public?

36 votes
Accepted

Why is there currently so little talk about a Venus gravity assist for a crewed Mars mission?

35 votes

What are the advantages of building a human colony on Mars vs the moon?

35 votes
Accepted

Why aren't payloads their own fairings?

35 votes
Accepted

Do Astronauts have their appendix removed?

34 votes

India just shot down a satellite from the ground. At what altitude range is the resulting debris field?

34 votes

Can either Opportunity or Curiosity explore the state of Spirit?

34 votes
Accepted

Could a Mars rover go to Phobos or Deimos instead?

33 votes

What is the difference between Cape Canaveral and Kennedy Space Center?

33 votes
Accepted

Does Virgin Galactic experience real weightlessness?

33 votes

Why do we not fly to space with helicopters? What are the practical altitude limits?

32 votes

Why is SpaceX building the Big Falcon Ship before the Big Falcon Rocket?

32 votes
Accepted

Going from LEO to lunar using only low-thrust ion propulsion - can it be done?

32 votes

Do any (LEO) satellites move east-to-west?

32 votes

Apollo communication between the Earth and Moon

31 votes
Accepted

Why was Titan the first celestial body beyond Mars to be landed on?

30 votes
Accepted

Why are the GPS constellation satellites in such a high orbit?

30 votes

How was Demo-2's Falcon 9 booster different from any other F9?

29 votes

Could Hubble observe the night side of the Moon?

29 votes
Accepted

Was a one way trip to the moon considered by the crew of Apollo 13?

29 votes

Can I drive Elon Musk's Tesla after it's been in space for 100 Years?

29 votes
Accepted

Why do ion thrusters frequently use xenon as the reaction mass?

28 votes

Can you tack against the sun using a solar sail?

28 votes
Accepted

Is it possible to reach space using home-made rocket?

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