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520 Answers

newest activity votes
63
Is pinging the Moon with a laser as shown on “The Big Bang Theory” possible?
Aug 16 '18 at 13:53
63
Why vent $CO_2$ and $H_2$ waste products to space on ISS?
Aug 7 '16 at 13:53
53
The dreaded apocalyptic asteroid approaches Earth but lands safely on the Moon at zero relative velocity
Nov 29 '18 at 11:55
45
Is the SpaceX Falcon Heavy payload (a Tesla car) space junk?
Feb 7 '18 at 13:26
39
Is Nibiru real or totally science fiction?
Jul 22 '18 at 1:57
30
How far have astronauts been in space?
Dec 30 '18 at 10:36
30
How is the altitude of a satellite defined, given that the Earth is not spherical?
Nov 28 '17 at 11:01
28
Are images of exoplanets' surfaces technically possible?
Nov 2 '18 at 9:22
27
Is it ethical for Chang'e-4 to bring an entire ecosystem to the moon?
Jan 11 at 16:28
27
Which LEO satellite lost over 30 km of altitude in the geomagnetic storm of 13-14 March 1989?
Apr 12 '18 at 0:39
26
Could a spy satellite in orbit be recommissioned to do astronomy?
Feb 18 '18 at 13:43
25
Question on giant satellite orbit
Nov 1 '18 at 5:20
24
How did NASA prevent third parties from spoofing Apollo communications?
Jun 13 '18 at 9:18
23
Is Quantum Entanglement technology possible for interplanetary communication in future to achieve low real-time latency?
Nov 28 '18 at 4:38
22
Does SpaceX put Falcon 9 2nd stages carrying geostationary satellites into a temporary sub-orbital trajectory before the second burn?
Jul 6 '17 at 17:12
22
Potential high temperature power sources for a Venus lander
Mar 22 '17 at 12:46
21
Could we possibly see the shadow offset from Parker Solar probe on Earth?
Dec 3 '18 at 2:05
21
Could a human jump off Mimas without return?
Oct 31 '18 at 9:58
20
How hard do you have to throw something off the ISS to make it deorbit?
Jun 21 '18 at 16:50
18
Does launching a device into orbit change earth's orbit?
Apr 17 '18 at 5:42
18
Do launchers using only solid propellant exist?
Apr 15 '18 at 8:57
18
What are the conditions for re-entry of an object in a (highly) elliptical orbit?
Apr 24 '17 at 12:20
17
Will it be possible to see BFR approaching the moon from earth, with naked eye?
Nov 17 '18 at 12:15
16
How can a Mars helicopter be autonomous if there isn't a Martian GPS?
Oct 24 '18 at 15:51
16
Does the International Space Station get TV?
Oct 2 '18 at 1:52
15
Apollo 11 mission report shows velocity well below escape velocity thousands of km on the way to the Moon
Jun 10 '18 at 6:03
15
What artificial satellite has the farthest orbit around the Earth?
May 11 '18 at 7:39
15
How to calculate data rate of Voyager 1?
Jan 8 '18 at 5:16
15
Why isn't a centrifuge used for astronauts on the space station?
Jul 30 '17 at 9:47
15
How long does it take for a signal to travel between Earth, and Juno at Jupiter?
Jul 5 '16 at 11:04
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