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uhoh
  • Member for 6 years, 11 months
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  • Taipei, Earth
161 votes
3 answers
25k views

How did the Apollo computers evaluate transcendental functions like sine, arctangent, log?

114 votes
6 answers
25k views

What makes Ada the language of choice for the ISS's safety-critical systems?

90 votes
6 answers
17k views

How much bigger could Earth be, before rockets wouldn't work?

84 votes
7 answers
22k views

What can the KSP game actually teach about spaceflight and orbital mechanics, and what are its limitations?

82 votes
5 answers
12k views

Could "peak Apollo levels" of support have gotten NASA astronauts to Mars in the 1980's?

69 votes
4 answers
10k views

Why did it take so long to notice that the ozone layer had holes in it? Which satellite provided the data?

63 votes
1 answer
8k views

How is stacking oranges in 24 dimensions related to receiving and decoding signals from the Voyagers?

61 votes
6 answers
11k views

When was Newton "not good enough" for spaceflight; first use and first absolute requirement for relativistic corrections?

61 votes
1 answer
11k views

Which Apollo "mystery" was said to be finally solved by a better rendering engine?

55 votes
3 answers
21k views

This image of the Space Shuttle is truly beautiful, but is it real?

54 votes
3 answers
11k views

Is 75 meters an exceptionally close distance for two satellites to pass at >6,000 m/s?

53 votes
4 answers
16k views

"Pillars of Baikonur" What is the purpose of the hundreds of short, white posts near the Baikonur Cosmodrome launch pad?

51 votes
5 answers
11k views

How often is duct tape used during crewed space missions?

48 votes
2 answers
13k views

What caused this bright light from the ground at night seen from the ISS?

47 votes
8 answers
13k views

What would be the (most difficult) challenge to make a 10,000 year satellite?

46 votes
3 answers
9k views

What is GPS' 19 year rollover and does it present a cybersecurity issue?

45 votes
10 answers
8k views

Have spacecraft photographed each other beyond Earth orbit?

44 votes
1 answer
9k views

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

43 votes
2 answers
5k views

What's the baseball bat for? (seen in CRS-8 berthing NASA TV broadcast)

42 votes
1 answer
9k views

What was NASA's "Hack" to improve Opportunity's memory in 2015? Did it help?

40 votes
1 answer
11k views

Why does this researcher have a "clear plastic bag" over their head?

37 votes
1 answer
3k views

What kind of orbit makes this wave shaped ground track?

37 votes
1 answer
5k views

Why does the Minotaur I wear a yellow jacket that "banana-peels" off as it launches?

36 votes
1 answer
6k views

Why does this rocket have a nose cone "cozy"?

36 votes
2 answers
7k views

How did the X-15 control attitude above the Kármán line?

36 votes
3 answers
10k views

Why were the SpaceX Crew-1 astronauts backed up by guards with automatic weapons?

36 votes
5 answers
6k views

Did Sputnik 1 tell us more than "beep"? What science was improved by information gained from its orbiting the Earth?

35 votes
2 answers
5k views

SpaceX and propulsive landing on Mars -- what just happened? (and why?)

34 votes
4 answers
5k views

Why is there a large wooden ball on Mariner 3's magnetometer?

34 votes
2 answers
5k views

Why is the X-37B's large nozzle offset to right from the spacecraft's mid-plane?

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