User neelsg

168 votes

2 answers

270k views

What computer and software is used by the Falcon 9?

asked May 29, 2015 at 7:49

68 votes

8 answers

40k views

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

asked Jan 9, 2015 at 11:12

34 votes

1 answer

7k views

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

asked Jun 15, 2015 at 12:59

29 votes

3 answers

7k views

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

asked Jul 29, 2015 at 7:52

28 votes

4 answers

8k views

Why does the Falcon 9 have 9 engines?

asked Jan 16, 2015 at 8:50

20 votes

1 answer

6k views

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

asked Jan 13, 2015 at 6:53

20 votes

7 answers

19k views

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

asked Apr 16, 2015 at 12:06

10 votes

3 answers

2k views

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

asked Apr 16, 2015 at 12:42

10 votes

1 answer

3k views

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

asked Feb 11, 2015 at 8:26

9 votes

2 answers

1k views

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

asked Jun 3, 2015 at 9:34

8 votes

2 answers

2k views

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

asked Jan 9, 2015 at 11:37

7 votes

2 answers

2k views

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

asked May 28, 2015 at 9:58

6 votes

1 answer

2k views

What auxiliary engines do the Falcon 9 first stage have?

asked Mar 3, 2015 at 8:43

5 votes

1 answer

1k views

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

asked Mar 2, 2015 at 11:04

4 votes

1 answer

380 views

What are the actual economics for the ULA reusability plan?

asked May 18, 2015 at 11:40

Stack Exchange Network

15 Questions

What computer and software is used by the Falcon 9?

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

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

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

Why does the Falcon 9 have 9 engines?

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

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

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

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

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

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

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

What auxiliary engines do the Falcon 9 first stage have?

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

What are the actual economics for the ULA reusability plan?