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15 Questions

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67

144

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2

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238k

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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

61

votes

8

answers

35k

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

spacex falcon-9 reuse first-stage

Aug 25 '16 at 1:37 Community♦ 1

4

29

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4

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7k

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Why does the Falcon 9 have 9 engines?

launch spacex falcon-9 design first-stage

Oct 1 '16 at 5:46 Adrian Midgley 1

5

29

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1

answer

6k

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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 54k

2

22

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4

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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 at 19:03 Steven Sands 1

4

20

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7

answers

16k

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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

18

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1

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6k

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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

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3

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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

9

votes

2

answers

1k

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

debris

Jun 3 '15 at 16:05 Organic Marble 114k

3

9

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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 131k

8

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2

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1k

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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 15.2k

7

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2

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1k

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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

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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 70k

1

5

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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 70k

4

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1

answer

311

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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 24.4k

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