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Hobbes

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120 posts edited
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4,467 votes cast
Summary Answers Questions Tags Badges Bookmarks Bounties Reputation All actions

34 Questions

Votes Activity Newest Views
11
86
votes
3
answers
119k
views

What happens to the Falcon 9 second stage after payload separation?

launch spacex falcon-9
Aug 23 at 15:57 PearsonArtPhoto♦ 109k
3
36
votes
6
answers
7k
views

Why did it take so long for methane to be used as a rocket propellant?

rockets spacex engine-design fuel raptor
Jan 14 '18 at 1:50 Baz 1
7
36
votes
2
answers
7k
views

What would it feel like to be in a Martian dust storm?

mars colonization environment dust weather
Dec 2 '13 at 20:58 Community♦ 1
6
29
votes
3
answers
7k
views

Starting a liquid fuel engine in zero gravity

propulsion orbit
Nov 7 '14 at 3:26 Community♦ 1
3
21
votes
1
answer
11k
views

Voyager 3: what would have been its mission, and why was it canceled?

nasa probe voyager canceled-project
Aug 24 '18 at 15:37 Oliver 1
 
20
votes
1
answer
575
views

Does the proximity of engines in engine clusters cause interference?

launch falcon-9 engines
Jul 9 '15 at 21:08 Community♦ 1
1
20
votes
1
answer
1k
views

Ariane 4: shroud around stage?

launch ariane
Nov 8 '13 at 17:02 Undo 17.3k
2
17
votes
2
answers
2k
views

NASA Launch Control: was all of its capacity ever used?

nasa apollo-program launch-site multi-launch
Sep 17 '15 at 12:37 Community♦ 1
2
15
votes
4
answers
8k
views

Was Hubble really related to spy satellites?

artificial-satellite telescope optical hubble military
Dec 16 '18 at 5:17 Community♦ 1
1
15
votes
4
answers
3k
views

What makes a payload fairing so expensive?

manufacturing fairings
Jun 17 '18 at 22:19 Mark G 9
2
14
votes
1
answer
1k
views

Where is Giotto now?

probe comet esa giotto
Nov 14 '19 at 22:54 PearsonArtPhoto♦ 109k
2
14
votes
7
answers
4k
views

Orbital mechanics: trying to understand counterintuitive behavior (braking to overtake)

orbital-mechanics
Feb 20 '19 at 0:07 Glorfindel 566
1
14
votes
1
answer
1k
views

Why did NASA discontinue use of the MMU?

astronauts space-shuttle eva
Mar 23 '14 at 15:30 Community♦ 1
3
13
votes
4
answers
7k
views

How big would a manned ascent stage for Mars need to be?

mars rockets propulsion engineering stages
Oct 26 '15 at 16:08 Organic Marble 130k
4
12
votes
3
answers
1k
views

How is the software for scientific space missions developed?

artificial-satellite probe software
Aug 19 at 13:19 jeancallisti 211
1
11
votes
1
answer
2k
views

How was the airlock installed on the Space Shuttle mid deck?

space-shuttle
Jun 10 '19 at 0:49 Organic Marble 130k
1
11
votes
1
answer
617
views

What were the differences between the LLRV and LLTV?

crewed-spaceflight apollo-program nasa training lltv
Jan 8 '14 at 17:46 oefe 2,091
 
10
votes
1
answer
5k
views

Why does the ISS not use the most efficient solar panels available?

iss solar-power
Oct 28 '19 at 7:58 Ian Jackson 1
1
10
votes
4
answers
4k
views

Where can I find data for Atmospheric density vs. altitude?

atmosphere atmospheric-drag
Aug 15 '19 at 7:46 Hobbes 117k
1
10
votes
1
answer
584
views

How does the Falcon 9 first stage land on the moving surface of the barge?

spacex falcon-9 landing first-stage
Jun 3 '16 at 19:17 Community♦ 1
3
9
votes
2
answers
2k
views

Why can't New Horizons send data and do observations at the same time?

voyager new-horizons
Jul 20 '15 at 18:06 Hobbes 117k
1
9
votes
1
answer
931
views

Why do we differentiate between astronauts and cosmonauts?

terminology astronauts
Apr 14 '14 at 12:26 TildalWave 72.6k
 
8
votes
1
answer
105
views

ESA's contribution to ISS: what has succeeded the ATV?

iss esa
Jul 28 '19 at 15:27 Hobbes 117k
1
7
votes
1
answer
520
views

What does the ISS Mission control center do?

iss communication mission-control
Nov 21 '18 at 4:44 DrSheldon 36.3k
 
7
votes
3
answers
1k
views

How does the Rocket Equation work when you use boosters?

rocket-equation
Oct 21 '18 at 5:30 uhoh 116k
 
7
votes
2
answers
1k
views

What is the rationale behind the manned versions of SLS?

launch rockets nasa orion-spacecraft
Feb 12 '14 at 15:26 Community♦ 1
2
6
votes
2
answers
599
views

How much of the sky can the JWST see?

james-webb-telescope
Aug 27 '19 at 2:23 Community♦ 1
1
6
votes
2
answers
4k
views

Does the second stage of the Falcon 9 have RCS thrusters?

spacex falcon-9 attitude design engines
Aug 15 '16 at 7:25 Hobbes 117k
 
5
votes
1
answer
391
views

Benefits of air-launching a rocket

air-launch
Apr 22 '19 at 13:26 Hobbes 117k
 
5
votes
3
answers
520
views

What is the correlation between the cost of a satellite and its lifetime?

artificial-satellite economics orbital-lifetime
Apr 25 '18 at 11:17 Georgie 84
1
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