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64 Answers

Votes Activity Newest
89
Why was it necessary to program InSight with an ability to land in dust storms?
Nov 26 '18 at 17:54
77
Why are so many space telescopes placed in LEO instead of at Lagrange Points? And why do we hear about Hubble more than any Langrange-orbit telescope?
Jun 16 '18 at 19:57
66
What is the farthest artificial satellite in orbit in our solar system?
May 29 '18 at 12:03
43
What holds SpaceX’s rocket in place in this launch?
Jun 21 '18 at 18:29
28
Could we see someone walking on Mars from Earth?
Sep 5 '18 at 20:05
27
What is the purpose of the satellite that China is putting in lunar orbit?
May 22 '18 at 14:09
25
Does anyone recognize these rockets, and their location?
Jun 13 '19 at 10:55
25
Why is Voyager/Pioneer so slow compared to Parker Solar Probe?
Dec 13 '18 at 14:15
25
Why does the 2nd stage of Falcon 9 need compressed He tanks?
Jun 10 '18 at 7:32
24
Why aren't payloads their own fairings?
Jun 21 '18 at 8:47
20
What would it cost to bring a 1 gram payload to the CMBR rest frame (i.e. Δv 368 km/s ?)
Aug 25 '18 at 11:41
20
How an americium-241 RTG would differ from one using plutonium-238?
May 24 '18 at 9:27
19
Has the Earth's red atmosphere rim ever been photographed?
Aug 13 '18 at 13:12
18
Can the Right Ascension and Argument of Perigee of a spacecraft's orbit keep varying by themselves with time?
Apr 12 '19 at 10:51
15
“Pillars of Baikonur” What is the purpose of the hundreds of short, white posts near the Baikonur Cosmodrome launch pad?
Jun 24 '18 at 16:44
13
Will an array of multiple ion engines still be more efficient than a single chemical engine?
Oct 9 '18 at 10:44
13
Rock flipping operation
Jun 12 '18 at 14:54
12
Is it possible to change to different orbit inclinations with a simple push?
Mar 29 '19 at 9:49
11
Debris breaking away from Electron rocket
Jul 26 '18 at 10:20
11
What is the minimal TWR of Falcon 9 booster right before touchdown?
Jul 26 '18 at 8:46
10
Why is the northeastern region of Syrtis Major Planum a selected landing site for the Mars 2020 mission?
Jun 23 '18 at 21:41
9
Significance of methane on Mars
Jun 8 '18 at 9:07
9
Will or could the Parker Solar Probe do science at Venus?
Aug 12 '18 at 19:44
9
Elliptical orbits transformed to “equivalent” circular orbit
Jul 18 '18 at 12:13
9
A spacecraft leaves Earth exactly with escape velocity V2 - what trajectory it will have in Solar System?
Jun 27 '18 at 10:58
8
How long will MASCOT operate on Ryugu?
Jun 22 '18 at 9:41
8
How far will the debris cloud from Hayabusa-2's touch-and-go sample recovery travel around Ryugu? Will any have escaped to heliocentric orbit?
Mar 6 '19 at 12:00
8
Spectral bands on an Earth-observing satellite
Jul 19 '18 at 17:48
7
Is the ESA Roscosmos ExoMars Orbiter capable of detecting the NASA landers and rovers on the surface of Mars?
Dec 1 '18 at 23:31
7
What is this huge, red, blinking light structure on Earth seen from the ISS in this video?
Nov 24 '18 at 15:14
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