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Hobbes
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1,288 Answers

Votes Activity Newest
92
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
83
Nudism in space: Why wear clothes anyway?
Dec 31 '17 at 18:35
83
Curiosity: Why did they “reinvent the wheel” instead of using pressure tires?
Dec 21 '13 at 14:01
75
Is Nibiru real or totally science fiction?
Jul 21 '18 at 18:15
72
How did NASA prevent third parties from spoofing Apollo communications?
Jun 13 '18 at 5:53
68
How can a Mars helicopter be autonomous if there isn't a Martian GPS?
Oct 24 '18 at 14:17
67
Why aren't we sending quadcopters to mars?
Nov 28 '16 at 20:16
65
Why is using a space elevator cheaper than rocket power?
Sep 5 '18 at 17:25
64
Is the SpaceX Falcon Heavy payload (a Tesla car) space junk?
Feb 7 '18 at 12:38
63
How did Apollo missions solve the cosmic radiation problem?
Nov 5 '18 at 14:59
57
Why do we not fly to space with helicopters? What are the practical altitude limits?
Jun 4 '18 at 15:42
57
SpaceX and propulsive landing on Mars — what just happened? (and why?)
Jul 28 '17 at 13:30
55
Would rocket engine exhaust create pockets of gas in space which could hinder further space exploration?
Oct 30 '19 at 17:57
55
Falcon 9 design: Why is the cargo fairing so much wider than the lower parts?
Nov 6 '17 at 9:04
51
instead of pressurizing an entire spacesuit with oxygen could oxygen just pressurize the head and the rest of the body be pressurized with water?
Oct 16 '19 at 6:32
50
Why is this part of the Space Shuttle launch pad suspended so high off the ground?
Mar 25 '19 at 11:30
50
Have any space suits (not) used “pulsed magnetic devices”?
Sep 18 '17 at 9:12
48
Can artificial satellite positions affect tides?
Jun 12 '19 at 6:35
48
Can Curiosity pay InSight a visit?
Nov 27 '18 at 14:11
48
When will New Horizons overtake Voyager 1 in distance from the Sun?
Jan 28 '14 at 13:00
46
Why didn't Voyager 1 and Voyager 2 crash on into Jupiter or Uranus when they approached near to these massive planets?
Jan 28 '19 at 16:41
46
Why does the SpaceX Falcon 9 rocket do a 180 flip for reentry?
Aug 23 '16 at 12:54
43
Why isn't there research to build a standard lunar, or Martian mobility platform?
Jul 10 '19 at 7:42
43
What celestial body did NASA carve and why is it eating a spacecraft?
Oct 30 '18 at 6:58
43
Why did NASA set up a computing facility in Bermuda in the Mercury epoch?
Mar 3 '17 at 10:51
42
Why do the Shuttle's external tanks appear to be rusted?
Oct 17 '13 at 17:30
42
How did the Apollo astronauts change film in their cameras?
Oct 5 '15 at 17:26
41
Why does this rocket have a nose cone “cozy”?
Dec 7 '17 at 16:01
41
How did the Apollo astronauts train for the 1/6G lunar landing?
Oct 23 '13 at 6:47
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