User Peter Green - Space Exploration Stack Exchange

Peter Green

Member for 7 years, 11 months
Last seen this week

15 Answers

Score Activity Newest

11 votes

Why is fuel cheap compared to rocket?

answered Feb 10, 2018 at 14:37

7 votes

Accepted

Why can Falcon Heavy bring 4.2 times as much mass to Mars than F9, but only 2.7 times as much to LEO?

answered Feb 7, 2018 at 2:30

6 votes

Is the overall mortality rate for being in a spacecraft in space or bound for space about 4%?

answered Apr 25, 2016 at 14:19

5 votes

How does the Rocket Equation work when you use boosters?

answered Feb 9, 2018 at 16:09

5 votes

Accepted

How long does the refurbishment process of a Falcon 9 take?

answered Nov 23, 2018 at 17:54

3 votes

Accepted

How do vehicles get smoothly to a circular low Earth orbit?

answered Jan 8, 2018 at 16:05

2 votes

What was the fate of the main core of the first Falcon Heavy launch?

answered Mar 12, 2018 at 0:40

2 votes

Why does the material for space elevators have to be really strong?

answered Oct 14, 2016 at 15:55

2 votes

What would it feel like for an astronaut if his/her spacesuit ran out of air?

answered Jun 28, 2019 at 16:32

2 votes

Are Falcon 9 1st stages now always landed at sea?

answered Aug 5, 2020 at 11:32

2 votes

Why is using a space elevator cheaper than rocket power?

answered Sep 11, 2018 at 17:42

1 vote

Have there ever been people trapped in a shut down spacecraft?

answered Dec 6, 2018 at 15:37

1 vote

Will SpaceX use a BFR Heavy mode, similar to the Falcon Heavy but with 3 BFR cores?

answered Feb 9, 2018 at 16:17

1 vote

Is there a database for space junk beyond Earth orbit, and is Roadster in it?

answered Apr 23, 2018 at 23:29

-1 votes

Why is the International Docking Adapter limited to mother ships and shuttles in a set mass range?

answered Mar 12, 2018 at 19:08