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Fred
  • Member for 7 years, 5 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?

29 votes
Accepted

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

26 votes

Rock arches on the moon?

21 votes

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

19 votes

Could you feel the wind on Mars?

19 votes

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

17 votes

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

16 votes

Is there dirt or its structural equivalent on Mars?

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?

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

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

13 votes

Agriculture on an exoplanet

12 votes

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

12 votes

Accurate map of Ceres

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

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

10 votes
Accepted

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

9 votes

Names of geographic features on moons or planets other than Earth found later to be controversial or provocative? Have any then been changed?

9 votes

What would be the practical benefits of finding life in the Solar System?

9 votes

What is the current status of ESA/Roscosmos cooperation with regard to the ExoMars Orbiter?

7 votes
Accepted

Has there ever been a dish antenna on a lander? If so, which was the first? How about rovers?

7 votes

Do we still have all the blueprints to go to the Moon?

6 votes

One year Mission: Using data from Valeri Polyakov?

6 votes

Laws and Treaties for Activities in Outer Space

6 votes
Accepted

The Surface of Mars