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76 votes
3 answers
51k views

Was the NOAA-N Prime satellite really dropped on the floor?

60 votes
5 answers
32k views

What are the towers around the SpaceX launch pad used for?

53 votes
2 answers
46k views

What is the purpose of the jets of water often under rocket engines during launch?

44 votes
3 answers
28k views

Would it have been possible to have sent the Space Shuttle around the Moon?

40 votes
4 answers
5k views

Are there any safety procedures in place on the ISS in case of puncture?

35 votes
3 answers
23k views

About how long will Curiosity last on its nuclear power?

28 votes
3 answers
2k views

What science are the Voyager missions still doing after so many years away from the Solar System?

26 votes
3 answers
14k views

Why is it so hard to walk on the Moon?

24 votes
1 answer
2k views

What problems led to the use of the Sky Crane system used by Curiosity?

21 votes
4 answers
10k views

How can Mars have dust storms with such a thin atmosphere?

21 votes
2 answers
3k views

Why did a flight controller say "Avionics power nominal" as Antares exploded?

20 votes
1 answer
6k views

Why is a stick required to operate Soyuz's computer?

20 votes
3 answers
696 views

Would temperatures be more stable under the surface of Mercury?

20 votes
2 answers
530 views

Does the Perseid peak affect mission launches?

19 votes
1 answer
1k views

Why are three cosmonauts required to move a Soyuz?

19 votes
2 answers
2k views

How are dead animals disposed of on the ISS?

18 votes
1 answer
25k views

At what angle did Apollo 13 need to reenter?

18 votes
4 answers
10k views

What is the base of a launchpad made of?

18 votes
1 answer
500 views

How will Curiosity manage its power when its nuclear power starts to run low?

17 votes
1 answer
848 views

How does NASA keep radiation from frying rovers?

17 votes
2 answers
2k views

Why is the "impossible" space drive impossible?

16 votes
3 answers
1k views

The Russians recently tested a new launch trajectory that goes to the space station in about six hours. What allowed for the difference?

16 votes
1 answer
9k views

What would have happened if the skin of an Apollo lunar module was ruptured?

16 votes
2 answers
2k views

Can plants grow in microgravity?

16 votes
2 answers
2k views

Do Russian and American spacecraft use the same docking mechanism?

16 votes
1 answer
427 views

What probe received the most gravitational assists?

16 votes
1 answer
2k views

Why aren't SpaceX controllers allowed to abort during the final 10 seconds?

16 votes
1 answer
2k views

Why is the Sokol spacesuit considered inadequate for EVA?

15 votes
1 answer
2k views

Do American astronauts wear Sokol space suits when flying on a Soyuz?

15 votes
1 answer
3k views

Why was the Apollo CM main engine thought to be unreliable on Apollo 13?