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15 Questions

Votes Activity Newest Views
68
149
votes
2
answers
246k
views

What computer and software is used by the Falcon 9?

spacex falcon-9 software flight-computer
Jun 7 at 2:58 Community♦ 1
18
62
votes
9
answers
36k
views

Why would SpaceX not use parachutes for the final descent of the first stage?

spacex falcon-9 reuse first-stage
Dec 11 at 10:48 M Urch 1
4
29
votes
4
answers
8k
views

Why does the Falcon 9 have 9 engines?

launch spacex falcon-9 design first-stage
Oct 1 '16 at 5:46 Adrian Midgley 1
4
29
votes
1
answer
6k
views

If I drop a feather from orbit, would it burn up or “hit” the ground?

reentry physics
Jun 16 '15 at 5:07 Mark Adler 54.8k
2
23
votes
4
answers
5k
views

Why did Voyager 2's velocity drop far below escape velocity before the first gravity assist?

gravity voyager delta-v escape-velocity
Oct 25 '19 at 19:03 Steven Sands 1
3
20
votes
7
answers
17k
views

How stable would a Falcon 9 first stage be after it has landed on a drone ship?

spacex falcon-9 reuse falcon9-r first-stage
Jul 19 '16 at 1:05 Community♦ 1
2
19
votes
1
answer
6k
views

Why does SpaceX appear to get less funding from NASA for the same thing as competitors?

spacex nasa commercial cost
Mar 19 '16 at 16:16 Community♦ 1
2
10
votes
3
answers
2k
views

Could SpaceX start testing to return the Falcon 9 first stage to land instead of water?

spacex landing reuse falcon9-r first-stage
Dec 29 '15 at 23:57 Community♦ 1
3
10
votes
1
answer
2k
views

What is the performance of ion thrusters in actual deployed spacecraft?

propulsion advanced-propulsion ion-thruster
Feb 11 '15 at 22:24 Russell Borogove 140k
 
9
votes
2
answers
1k
views

How much of the space debris around Earth is man-made?

debris
Jun 3 '15 at 16:05 Organic Marble 129k
 
8
votes
2
answers
1k
views

Would it not be easier for SpaceX to make their first stage only partly reusable?

spacex falcon-9 reuse first-stage
Jan 9 '15 at 14:29 AlanSE 15.4k
 
7
votes
2
answers
1k
views

Why does SpaceX not use the Crew Dragon for CRS missions to test it?

spacex dragon dragon-v2
May 28 '15 at 12:40 Community♦ 1
 
6
votes
1
answer
1k
views

What auxiliary engines do the Falcon 9 first stage have?

spacex falcon-9 engines falcon9-r attitude
Mar 3 '15 at 12:46 geoffc 72.5k
1
5
votes
1
answer
1k
views

Most common causes of 21st century launch failures and how often do launches fail?

launch spacex failure reliability
Mar 2 '15 at 16:00 geoffc 72.5k
 
4
votes
1
answer
315
views

What are the actual economics for the ULA reusability plan?

reuse economics booster ula vulcan
May 18 '15 at 19:19 LocalFluff 25k
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