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1,070 Answers

newest activity votes
88
Can I drive Elon Musk's Tesla after it's been in space for 100 Years?
Jan 9 '18 at 11:44
87
How many times do you have to circle the Earth to break orbit?
Jan 17 '18 at 19:06
76
Curiosity: Why did they “reinvent the wheel” instead of using pressure tires?
Dec 21 '13 at 14:01
72
Nudism in space: Why wear clothes anyway?
Dec 31 '17 at 18:35
71
How did NASA prevent third parties from spoofing Apollo communications?
Jun 13 '18 at 5:53
70
Is Nibiru real or totally science fiction?
Jul 21 '18 at 18:15
65
How can a Mars helicopter be autonomous if there isn't a Martian GPS?
Oct 24 '18 at 14:17
64
Why is using a space elevator cheaper than rocket power?
Sep 5 '18 at 17:25
63
Is the SpaceX Falcon Heavy payload (a Tesla car) space junk?
Feb 7 '18 at 12:38
62
Why aren't we sending quadcopters to mars?
Nov 28 '16 at 20:16
60
How did Apollo missions solve the cosmic radiation problem?
Nov 5 '18 at 14:59
56
SpaceX and propulsive landing on Mars — what just happened? (and why?)
Jul 28 '17 at 13:30
54
Why do we not fly to space with helicopters? What are the practical altitude limits?
Jun 4 '18 at 15:42
53
Falcon 9 design: Why is the cargo fairing so much wider than the lower parts?
Nov 6 '17 at 9:04
49
Have any space suits (not) used “pulsed magnetic devices”?
Sep 18 '17 at 9:12
45
Why does the SpaceX Falcon 9 rocket do a 180 flip for reentry?
Aug 23 '16 at 12:54
45
When will New Horizons overtake Voyager 1 in distance from the Sun?
Jan 28 '14 at 13:00
43
Can Curiosity pay InSight a visit?
Nov 27 '18 at 14:11
42
What celestial body did NASA carve and why is it eating a spacecraft?
Oct 30 '18 at 6:58
41
How did the Apollo astronauts change film in their cameras?
Oct 5 '15 at 17:26
40
How do rocket scientists do iterative development?
Apr 5 '18 at 8:20
40
Why did NASA set up a computing facility in Bermuda in the Mercury epoch?
Mar 3 '17 at 10:51
39
Why does this rocket have a nose cone “cozy”?
Dec 7 '17 at 16:01
39
Why do the Shuttle's external tanks appear to be rusted?
Oct 17 '13 at 17:30
38
Why would GPS availability be reduced by high demand (or solar eclipse)?
Aug 6 '17 at 20:56
36
Why are probes that tend to explore outer system always launched to go outwards instead of straight upwards or downwards?
Jan 3 at 15:56
36
How could the 2018-08-30 Soyuz MS-09 / ISS leak be so slow?
Sep 6 '18 at 12:45
36
Why there is no orbiter for Uranus or Neptune?
Apr 4 '17 at 11:29
35
How did the X-15 control attitude above the Kármán line?
Oct 17 '18 at 10:38
35
Is there any merit to the Apollo 13 (movie) statement “a computer that can hold millions of pieces of information”?
Oct 28 '15 at 19:25
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