Fred's user avatar
Fred's user avatar
Fred's user avatar
Fred
  • Member for 9 years, 3 months
  • Last seen this week
  • Southern Hemisphere
156 votes

If the astronauts on Apollo 11 had landed safely on the moon but could not take off, would there have been a rescue mission?

69 votes
Accepted

How (the heck) did Lunokhod 2 drive, navigate and survive a ~40 kilometer drive over four months on the Moon using 1970's technology?

39 votes
Accepted

Why do the boot prints on the moon appear bright in some photographs or film?

29 votes
Accepted

Cartoon-like characters on the side of the Tianwen-1 Mars lander?

26 votes

Rock arches on the moon?

21 votes

Did Apollo astronauts spend any time on the lunar surface during lunar night?

21 votes

Why doesn't Roscosmos launch Soyuz spacecraft with only Russians on board?

20 votes

Would a broken arm/ leg be more painful in zero gravity?

19 votes

Could you feel the wind on Mars?

17 votes

Is there dirt or its structural equivalent on Mars?

17 votes

Has any space agency saved Earth from a major calamity any time?

16 votes
Accepted

What causes moonquakes?

15 votes
Accepted

What sort of analysis was performed before "modern" computing and the invention of finite element analysis and computational fluid dynamics?

15 votes

Would it have been possible to launch rockets in secret in the 1960s?

15 votes

What's the orange star I can see in the sky right now?

14 votes

Mining Helium-3 on the Moon and sending it to Earth?

14 votes

How do space suits offer heat protection i.e. during the lunar day?

13 votes

Why wasn't the phosphine in Venus' atmosphere detected by space probes?

13 votes

Accurate map of Ceres

13 votes

Agriculture on an exoplanet

12 votes
Accepted

Why is dust such a problem in microgravity? Wouldn't proper air circulation and filtration take care of it?

12 votes

Habitable rocky exoplanet with radius 2 times of Earth but similar surface gravity

12 votes
Accepted

Would gold mining on Mars be truly profitable?

11 votes
Accepted

How many satellites were orbited from Australia in total?

11 votes

Sub Lunar Mining

11 votes

A Philae Lander (like) anchoring harpoons on M-Type (metallic) asteroid. Can a nail gun and the effect of Cold Welding be a working solution?

11 votes
Accepted

Embedding foundations from low lunar orbit?

10 votes

Why is it assumed that space flights have to be safe?

10 votes
Accepted

Why does Pluto have a molten core and the Moon does not?

9 votes

How can we source potassium fluoride outside of Earth?

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