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284 Questions

Votes Activity Newest Views
5
40
votes
6
answers
16k
views

Does a satellite naturally turn in phase with its orbit, always facing Earth?

orbital-mechanics artificial-satellite attitude rotation
Oct 30 '18 at 6:16 Community♦ 1
5
37
votes
7
answers
10k
views

What are the most serious injuries that astronauts have suffered while in orbit?

crewed-spaceflight history astronauts health risk-management
Feb 26 '18 at 15:33 Community♦ 1
3
35
votes
1
answer
4k
views

Is there a mockup of the ISS on the ground?

iss crewed-spaceflight simulation training facility
Apr 23 '17 at 16:28 Organic Marble 129k
4
32
votes
3
answers
4k
views

What causes microgravity (i.e. non-zero gravity) in orbit?

microgravity gravity
Feb 23 '19 at 8:26 Hobbes 117k
5
30
votes
7
answers
8k
views

Why weren't Saturn V and the Soviet N-1 Moon rockets made larger in order to simplify Lunar missions?

the-moon design mission-design saturn-v n-1
Dec 4 '18 at 11:59 Baldrickk 2,330
1
26
votes
9
answers
8k
views

Can a satellite orbit Earth so that it always has the Moon in line of sight?

the-moon orbit communication-satellite earth
Oct 23 '14 at 7:06 Mark Pounds Jr. 1
1
23
votes
3
answers
4k
views

Could a spy satellite in orbit be recommissioned to do astronomy?

space-telescope earth-observation reconnaissance-satellite
Feb 18 '18 at 23:30 Community♦ 1
2
21
votes
7
answers
4k
views

Why didn't the Apollo program do an uncrewed landing/ascent rehearsal?

apollo-program uncrewed-spaceflight crewed-spaceflight
Sep 22 '19 at 19:47 Uwe 35.1k
2
21
votes
4
answers
902
views

Could a rocket engine be designed to use different fuels? (Like LOX+H2, LOX+CH4)

engine-design fuel
May 30 '18 at 8:51 mpv 2,872
3
21
votes
2
answers
2k
views

How are EVA's in LEO affected by being at the night side of Earth?

iss low-earth-orbit eva
Feb 5 '16 at 15:01 Community♦ 1
3
20
votes
3
answers
6k
views

Why are the very reliable rockets Atlas V and Ariane V not rated for human flight?

rockets crewed-spaceflight reliability human-rating
May 22 '19 at 9:43 PearsonArtPhoto♦ 109k
1
19
votes
1
answer
2k
views

How did the attitude system of the uncrewed Soyuz 7K-OK No.1 fail on the launch pad in 1966, killing ground staff as LES was activated?

attitude soyuz-spacecraft launch-escape-system failure soyuz-launcher
Feb 3 '19 at 11:46 Brian Tompsett - 汤莱恩 5,818
3
19
votes
1
answer
4k
views

Could the Soviets have rounded the Moon before Apollo? Why didn't they?

apollo-program history crewed-spaceflight russia space-race
Jun 12 '15 at 19:43 Nathan Tuggy 4,424
3
18
votes
6
answers
4k
views

Could an Apollo crew have been killed by Solar radiation?

apollo-program radiation the-sun shielding
Nov 25 '19 at 12:15 Ludo 6,113
1
18
votes
3
answers
3k
views

Could Hubble observe the night side of the Moon?

the-moon observation hubble lro
Jan 25 '19 at 3:06 Community♦ 1
2
18
votes
5
answers
1k
views

Why won't JWST deploy in LEO where it is potentially serviceable?

low-earth-orbit lagrangian-points eva james-webb-telescope
Sep 23 '18 at 6:16 Evan Finch 21
 
18
votes
2
answers
5k
views

Do the solid rocket boosters of the Shuttle and SLS have a self-destruct system and was it activated during the Challenger disaster?

space-shuttle sls solid-fuel abort self-destruct
Aug 6 '18 at 18:26 Community♦ 1
1
18
votes
4
answers
3k
views

How large could launchers become?

spacecraft-development launch-vehicle
Mar 24 '17 at 5:18 Community♦ 1
2
18
votes
1
answer
3k
views

Why design new rocket engines instead of using the existing types?

rockets engine-design engineering cost
Sep 12 '15 at 12:00 Community♦ 1
2
17
votes
3
answers
2k
views

Could a spacecraft be made out of wood?

life astrobiology life-support design-alternative
Dec 29 at 13:04 uhoh 116k
2
17
votes
3
answers
1k
views

Why do KSC crawler-transporters use caterpillar treads instead of rail tracks?

launch-site engineering launchpad operations kennedy-space-center
Jul 24 '19 at 21:08 DrSheldon 36.2k
2
17
votes
1
answer
281
views

When have secondary payloads damaged the primary payload of a launcher?

launch failure payload
Apr 26 '19 at 13:01 Community♦ 1
1
16
votes
2
answers
3k
views

Why were the Sputniks launched to such high apogee?

orbital-mechanics history sputnik
Dec 13 '19 at 14:33 Sergiy Lenzion 5,857
2
16
votes
3
answers
2k
views

What missions could be done with Orion on Falcon Heavy?

nasa spacex crewed-spaceflight orion-spacecraft falcon-heavy
Jul 20 '19 at 12:51 Daubrege Jean-marie 1
2
16
votes
2
answers
3k
views

Could the Apollo lunar ascent stage have separated from the descent stage before touchdown in an emergency?

apollo-program lunar-landing abort launch-escape-system
Jul 25 '18 at 11:26 Uwe 35.1k
1
16
votes
1
answer
899
views

When are there launch windows to Neptune via Jupiter?

orbital-mechanics jupiter gravity-assist neptune launch-window
Sep 9 '17 at 14:18 PearsonArtPhoto♦ 109k
1
16
votes
1
answer
2k
views

How is the space station's interior cleaned?

iss health hygiene cleaning
Mar 18 '17 at 19:26 David Hammen 45.5k
3
15
votes
3
answers
2k
views

Is it more challenging to put an airship in the Uranian than in the Venusian atmosphere?

atmosphere venus balloons neptune uranus
Sep 22 at 6:22 LazyReader 1
2
15
votes
4
answers
3k
views

Why didn't Apollo land on the Lunar poles?

the-moon apollo-program lunar-landing isru
Sep 5 '19 at 6:32 DrSheldon 36.2k
 
15
votes
3
answers
648
views

Will or could the Parker Solar Probe do science at Venus?

probe venus payload the-sun parker-solar-probe
Oct 6 '18 at 22:59 Community♦ 1
1
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