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15 Questions

Votes Activity Newest Views

68

149

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2

answers

246k

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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

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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

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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

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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

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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

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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

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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

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5

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1

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1k

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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

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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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