Mark Foskey's user avatar
Mark Foskey's user avatar
Mark Foskey's user avatar
Mark Foskey
  • Member for 7 years, 8 months
  • Last seen this week
74 votes
Accepted

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

53 votes

Does Virgin Galactic experience real weightlessness?

42 votes

Why doesn’t NASA build its rockets using graphene?

37 votes
Accepted

Why did Saturn V not head straight to the moon?

31 votes

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

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?

23 votes
Accepted

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

20 votes

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

19 votes
Accepted

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

17 votes

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

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?

8 votes

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

8 votes

Is the zero gravity experienced in ISS the "artificial" kind?

8 votes

When was advertising on Earth from space first proposed? By who?

8 votes

Why fly to the moon when you can fly away?

8 votes

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

7 votes
Accepted

Can Juno use Jupiter's gravity to alter its orbit so that it goes close to Himalia?

7 votes

What caused the jitter in the DART video as it approached Dimorphos?

6 votes
Accepted

Are there any short-term survivable locations beyond the solar system?

6 votes

A black cube 1 mile per side appears in geosynchronous orbit around the earth. Who would spot it and how would they do it? How easy would it be?

6 votes
Accepted

What is the smallest object our current technology is capable of launching into space?

6 votes

Could Liquid Methane on Titan be used as a Heat Source?

6 votes

If 'space' is defined as the absence of everything, then why can it carry heat?

6 votes
Accepted

Are any of the planets in our solar system (other than Earth) inhabitable?