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Mark Foskey's user avatar
Mark Foskey's user avatar
Mark Foskey's user avatar
Mark Foskey
  • Member for 9 years
  • Last seen this week
75 votes
Accepted

Why were the Voyager spacecraft numbered "out-of-order"?

55 votes

Apollo: what was the big deal?

53 votes

Does Virgin Galactic experience real weightlessness?

50 votes
Accepted

Why do we need to make probes land on other planets or moons?

42 votes

Why doesn’t NASA build its rockets using graphene?

39 votes
Accepted

Why did Saturn V not head straight to the moon?

39 votes

Temperature of the moon 4ft off the surface

31 votes

If an astronaut threw a cup of coffee into space, would it freeze, or boil off into gas?

30 votes
Accepted

How feasible would this mission to Proxima Centauri be?

29 votes

Why are probes that tend to explore outer system always launched to go outwards instead of straight upwards or downwards?

28 votes

Is it possible for a moon to have a higher surface gravity than the planet it is attached to?

28 votes

Why was the imaging quality of the Voyager probes *much* better than the Pioneer probes despite being launched only 5 years later?

24 votes

What kept the Soviets from going to the Moon (before the US)?

23 votes
Accepted

If Earth had a second moon, where would it be positioned?

21 votes
Accepted

Can Maglev trains ever reach escape velocity?

20 votes

If a spaceship ran out of fuel somewhere in space between Earth and Mars, does it slowly drift off to the Sun?

20 votes
Accepted

Why did Neil Armstrong alone, not NASA, end up coming up with the first words uttered on the moon?

18 votes

What does "reaction" in "reaction control system" and "reaction wheel" refer to?

17 votes

Could a satellite survive for thousands of years in a high enough orbit?

14 votes

Could Apollo have survived the lander toppling over?

12 votes

What speed could you achieve by slingshotting around earth from moon?

12 votes
Accepted

Could a ball of water stay in orbit?

11 votes
Accepted

Why don't I find the concept of cosmic velocities in western space-related materials?

10 votes

Why is it so hard to land on the Moon?

10 votes

Is the far side of the tidally locked Europa moon safe from Jupiter's radiation?

9 votes
Accepted

Why didn't the Apollo 13 crew wear their spacesuits in the LM?

9 votes

“Parabolic”, suborbital and ballistic trajectories all follow elliptic paths. Is there a generic term for these trajectories?

8 votes

Why fly to the moon when you can fly away?

8 votes

Using 2023 technology, how low can a satellite orbit earth?

8 votes

Curiosity and Perseverance landing - with so much dust blown everywhere, what's the point of the skycrane?