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SE - stop firing the good guys's user avatar
SE - stop firing the good guys's user avatar
SE - stop firing the good guys
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23 votes
4 answers
9k views

Why did the Apollo Lunar Module have four landing legs?

39 votes
2 answers
8k views

Why do they have a Snellen eye chart on the ISS?

19 votes
2 answers
4k views

Was the third shuttle engine any different from the others?

12 votes
1 answer
4k views

How many left handed astronauts have there been?

14 votes
1 answer
3k views

Can the Sun set twice during the same day on Mercury?

24 votes
2 answers
3k views

Why do the contents of the Space Shuttle External Tank not match the mixture ratio of the engines?

8 votes
3 answers
3k views

How can I view the Voyager golden record images?

15 votes
2 answers
2k views

What is the reason for the Ariane 5 launcher with Intelsat 29e losing altitude?

20 votes
2 answers
2k views

Is the ideal transfer between two arbitrary planar orbits always a bi-tangential ellipse?

14 votes
1 answer
2k views

How can the 6.5 m primary mirror of the JWST fit inside the 5.4 m fairing of Ariane 5?

21 votes
3 answers
2k views

Optimal depth for underground flyby?

13 votes
3 answers
2k views

What orbital launch-site can I lawfully visit?

13 votes
4 answers
2k views

What was the reason for an odd number of astronauts in almost every group of the early US space program?

4 votes
2 answers
1k views

Saving delta-v by splitting plane changing manoeuvre?

8 votes
2 answers
1k views

What does the abbreviation "MS" for the current Soyuz version name mean?

10 votes
1 answer
1k views

Are ion thruster trajectories classified as brachistochrones?

4 votes
1 answer
1k views

What was the Apollo service module propellant used for on the LEO missions?

13 votes
1 answer
969 views

Is it possible to use zinc powder as a NTR propellant?

8 votes
2 answers
964 views

What happens to a spacecraft crashing into the Moon?

9 votes
1 answer
946 views

Is there a neat formula for hyperbolic Kentucky windage?

18 votes
5 answers
917 views

What target is the most difficult to reach in the solar system?

18 votes
1 answer
899 views

What is the optimal inclination change strategy?

11 votes
4 answers
872 views

Balancing a mirror

10 votes
1 answer
844 views

Is this really the logo of the North Korean space program?

12 votes
1 answer
790 views

How does tankage mass really scale?

6 votes
1 answer
722 views

How close do gravitational 2-body hierarchy levels get?

8 votes
1 answer
707 views

Which computer monitors will work on Mars?

9 votes
3 answers
691 views

What is the highest number of impulses required for an optimal orbital transfer?

4 votes
2 answers
673 views

A constant parameter in a three body system?

12 votes
3 answers
587 views

What image compression algorithm did the Voyagers use?