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Active 2 Bountied Hot Week Month
6 votes
1 answer
163 views
+50

How to protect Mars/Moon mission crews against meteors?

Gabriel Sanchez
  • 174
1 vote
0 answers
20 views

Orange lines coming from rocket engine nozzle?

fasterthanlight
  • 2,727
3 votes
0 answers
44 views
+50

Which were the more than 60 (!) candidate locations for the Mars 2020 rover?

Cornelis
  • 7,355
9 votes
1 answer
63 views

Could Bepi-Colombo image the Messenger impact site?

Dave Gremlin
  • 2,214
1 vote
1 answer
157 views

Questions about Orbital Propagation

David Hammen
  • 66.1k
0 votes
0 answers
17 views

Orbital Angular Momentum on STK

Frank
  • 171
7 votes
3 answers
2k views

How can Artemis 1 take so much longer for Earth-Lunar transit than the Apollo missions did?

the_rocket_man_
  • 1
0 votes
0 answers
757 views

What is the best fuel for bottle rocket? [closed]

CommunityBot
  • 1
2 votes
1 answer
50 views

How to find cost data for commercially available spacecraft components?

Puffin
  • 8,968
1 vote
1 answer
84 views

Satellite position using 2 station ranging

Ryan C
  • 6,132
12 votes
4 answers
1k views

How does Spinlaunch manage the counterweight right after launch?

Mr. Klauz
  • 1
2 votes
0 answers
126 views

Why will the next missions to Mars not search for past life where once deep-water hydrothermal vents were?

Cornelis
  • 7,355
3 votes
1 answer
266 views

Images of the DART impact on Asteroid Dimorphos other then DART images

Brioche
  • 146
3 votes
0 answers
37 views

Dilution of precision in different coordinates

Željko_JL
  • 49
2 votes
2 answers
72 views

How to calculate the ECEF coordinates of a satellite given its elevation and azimuth angle, plus the coordinates of a reference object on Earth

Željko_JL
  • 49
10 votes
6 answers
2k views

When has hydrogen peroxide been used in rocketry?

Russell Borogove
  • 162k
7 votes
2 answers
406 views

How (the heck) was coherent synthetic aperture radar (SAR) implemented using photographic emulsion aboard Apollo 17?

uhoh
  • 148k
4 votes
1 answer
142 views

Draper Semianalytical Satellite Theory (DSST) C/C++ version

Ryan C
  • 6,132
0 votes
1 answer
67 views

What would the TLE data (Mean Motion, Eccentricity, Inclination, RAAN, Argument of Pericenter) of GEO and PO be like?

Ryan C
  • 6,132
7 votes
0 answers
218 views

Tory Bruno mentioned "unsolvable combustion instability" of "large methane engines". What, why, how?

Spacey XL
  • 11
8 votes
0 answers
175 views

What are the negatives associated with Thrust-augmented Nozzles aka Afterburning Rocket Engines?

Spacey XL
  • 11
3 votes
0 answers
110 views

What would have happened if DART failed to hit Didymoon?

RAD6000
  • 1,026
2 votes
1 answer
291 views

long sequence of satellites moving west to east?

Mark
  • 1
13 votes
2 answers
2k views

What caused the jitter in the DART video as it approached Dimorphos?

Mark Foskey
  • 7,444
56 votes
7 answers
6k views

What technological breakthroughs were required to land booster stages?

Russell Borogove
  • 162k
1 vote
1 answer
92 views

What is the propellant consumption rate for Soyuz?

Russell Borogove
  • 162k
8 votes
3 answers
524 views

Could an Apollo Lunar Module have landed and returned without Earth assistance?

Russell Borogove
  • 162k
2 votes
2 answers
148 views

Orbital Chinese firework-cluster

Russell Borogove
  • 162k
13 votes
1 answer
1k views

Why NASA's sudden renewed (apparently) interest in Wax hybrid engines? Which property is so attractive now?

Russell Borogove
  • 162k
5 votes
1 answer
310 views

Why was Apollo 17 considered to have "achieved a very successful geological survey"?

Russell Borogove
  • 162k
1 vote
2 answers
259 views

Looking for figures for contemporary interstellar engine options

Russell Borogove
  • 162k
2 votes
2 answers
203 views

Was it possible for the Chinese to send a rocket using gunpower past the Karman line?

Russell Borogove
  • 162k
9 votes
1 answer
495 views

Why would a significant non-zero angle of attack be an advantage during 1st stage burn?

Russell Borogove
  • 162k
1 vote
0 answers
42 views

What will be more important for the first NASA led human mission to Mars, the exploration of important science targets or the mining of water ice?

Cornelis
  • 7,355
12 votes
1 answer
788 views

Why do the shapes of these two exhaust plumes from an Atlas V 411 look different?

Ryan C
  • 6,132
24 votes
3 answers
2k views

How are cryogenic rocket propellants delivered to the launch pad?

Tom Goodfellow
  • 1,509
8 votes
2 answers
293 views

How do you mine water on Mars?

Fred
  • 11.2k
6 votes
1 answer
121 views

Depth to diameter ratio of impact craters

Oscar Lanzi
  • 7,960
0 votes
0 answers
40 views

Pre burner design for cryogenic propellants [closed]

hello_world07
  • 1
1 vote
0 answers
73 views

What are better ways to deliver heat directly to propellant in a Thermal Rocket design for use in launch than UV such as in the Nuclear Lightbulb?

PedrohSpaceWolfy
  • 11
2 votes
0 answers
36 views

Would planetary quarantine have to be used for asteroid mining missions?

fasterthanlight
  • 2,727
5 votes
1 answer
118 views

Have there been any rockets whose payload fairings consisted of more than two parts?

Organic Marble
  • 163k
6 votes
1 answer
119 views

Were there backup routes planned for the Apollo LRV?

Ludo
  • 12.8k
11 votes
1 answer
448 views

What went wrong with Apollo 15 astronaut Al Worden's seat when he was all alone, circularizing?

Ludo
  • 12.8k
2 votes
0 answers
86 views

How do different stages attach to each other?

Organic Marble
  • 163k
8 votes
0 answers
97 views

Dimorphos natural orbit variability vs DART impact

Heopps
  • 8,636
0 votes
0 answers
39 views

A hybrid micropropulsion system for CubeSats

JD_PM
  • 101
0 votes
1 answer
36 views

How to convert TLE data into state vectors in ITRF?

David Hammen
  • 66.1k

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