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1,935 posts edited
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2,145 Questions

Votes Activity Newest Views
41
150
votes
3
answers
22k
views

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

apollo-program history mathematics flight-computer
Jun 11 at 12:57 uhoh 119k
16
106
votes
6
answers
23k
views

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

iss safety software flight-computer computing
Jun 9 '19 at 1:27 Community♦ 1
27
80
votes
7
answers
20k
views

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

orbital-mechanics crewed-spaceflight uncrewed-spaceflight kerbal-space-program education
Dec 31 '17 at 17:51 Community♦ 1
13
79
votes
5
answers
12k
views

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

mars crewed-spaceflight apollo-program
Jun 21 '18 at 14:43 M.A. Golding 31
24
78
votes
6
answers
13k
views

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

launch rockets payload escape-velocity performance
Feb 5 at 17:43 Suma 244
12
60
votes
1
answer
11k
views

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

the-moon apollo-program imaging photography
Feb 15 '17 at 12:51 Federico 960
4
59
votes
6
answers
11k
views

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

orbital-mechanics history physics
Dec 11 '19 at 1:03 Eric Baird 86
8
55
votes
3
answers
21k
views

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

iss nasa space-shuttle imaging space-art
Sep 21 '18 at 14:39 Community♦ 1
8
54
votes
3
answers
7k
views

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

nasa atmosphere earth-observation weather
Jan 14 at 23:03 mjr 103
6
54
votes
3
answers
10k
views

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

collision-avoidance skyfield satellite-constellation
Dec 14 '16 at 17:24 Community♦ 1
4
53
votes
4
answers
15k
views

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

launch-site russia identify-this-object baikonur-cosmodrome
Jun 26 '18 at 12:23 Community♦ 1
11
47
votes
8
answers
12k
views

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

artificial-satellite engineering orbital-lifetime space-art
Nov 28 at 9:54 uhoh 119k
5
47
votes
2
answers
11k
views

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

iss low-earth-orbit identify-this-object earth-observation space-art
Jun 9 at 8:28 uhoh 119k
4
45
votes
10
answers
7k
views

Have spacecraft photographed each other beyond Earth orbit?

deep-space photography
Jan 23 '20 at 9:37 CallMeTom 2,179
2
43
votes
4
answers
9k
views

How often is duct tape used during crewed space missions?

apollo-program in-space-repairs
Jun 15 at 22:19 Community♦ 1
7
43
votes
2
answers
4k
views

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

iss nasa berthing
Apr 8 '19 at 11:49 fonsi 215
4
42
votes
3
answers
9k
views

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

gps gnss
Apr 9 '19 at 16:32 Community♦ 1
4
40
votes
1
answer
11k
views

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

emergency
Aug 8 '18 at 17:38 asdfex 9,380
1
40
votes
1
answer
8k
views

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

mars rovers opportunity
Jun 14 '18 at 8:44 Community♦ 1
 
37
votes
1
answer
3k
views

What kind of orbit makes this wave shaped ground track?

isro ground-track
May 13 '18 at 9:13 Steve Linton 18.2k
2
36
votes
1
answer
5k
views

Why does this rocket have a nose cone “cozy”?

rockets apollo-program space-art
Apr 30 '19 at 16:54 Community♦ 1
3
36
votes
2
answers
7k
views

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

adcs spaceplane x-15 karman-line
Oct 17 '18 at 15:12 Uwe 35.9k
2
35
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?

orbital-mechanics history russia soviet-union sputnik
Sep 6 at 19:05 Uwe 35.9k
4
34
votes
4
answers
4k
views

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

spacecraft testing mariner
Aug 1 at 21:19 Uwe 35.9k
3
34
votes
5
answers
8k
views

India just shot down a satellite from the ground. At what altitude range is the resulting debris field?

debris military weapon india anti-sat
Jan 19 '20 at 0:56 Community♦ 1
1
34
votes
2
answers
7k
views

How do ISS astronauts “get their stripes”?

iss spacesuits
Mar 19 '19 at 17:24 uhoh 119k
2
34
votes
2
answers
5k
views

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

spacex red-dragon propulsive-deceleration
Jul 28 '17 at 20:09 Joshua Oguma 1
6
33
votes
2
answers
8k
views

Has anyone in space seen or photographed a simple laser pointer from Earth?

photography earth-observation
Feb 18 at 2:38 RockPaperLz- Mask it or Casket 181
3
33
votes
1
answer
4k
views

Why does this image of Jupiter look so strange?

jupiter juno
Sep 21 '19 at 8:39 uhoh 119k
1
32
votes
2
answers
9k
views

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

crewed-spaceflight launch-site military security weapon
Nov 18 at 17:29 Jörg W Mittag 6,221
1
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