User geoffc

33 votes

How can the reusable Falcon 9 succeed when the reusable Space Shuttle failed?

answered Feb 9, 2015 at 13:27

32 votes

How do the sizes of the various proposed manned capsules differ?

answered Feb 3, 2015 at 18:55

32 votes

Why are there no spacecraft rotating for artificial gravity?

answered Aug 26, 2015 at 13:28

31 votes

Accepted

Why were jet engines not used in place of the solid fuel in the STS SRBs?

answered Dec 8, 2014 at 15:32

31 votes

What happens to defunct lunar and Mars rovers? What technological barriers prevent humanity from creating a perpetual rover?

answered Aug 2, 2013 at 20:22

30 votes

Accepted

Apollo command module space walk?

answered Apr 16, 2019 at 16:44

30 votes

Accepted

What makes 21st century fairings so valuable that they'd potentially be recovered and re-used?

answered Feb 2, 2017 at 18:20

30 votes

Accepted

Can a rocket be launched while it rains?

answered Mar 2, 2014 at 12:53

30 votes

Accepted

Why is Falcon 9's shape so tall and skinny?

answered May 31, 2015 at 10:42

29 votes

For the Starship SN8 flight, did they lose engines in flight?

answered Dec 16, 2020 at 21:14

29 votes

Accepted

Why are three cosmonauts required to move a Soyuz?

answered Nov 2, 2013 at 23:07

28 votes

Accepted

Isn't Starship way too big?

answered Apr 20, 2021 at 15:19

28 votes

Accepted

More efficient SpaceX landings?

answered Mar 8, 2017 at 18:28

28 votes

Why does SpaceX have a launch window for a pad abort test?

answered Apr 22, 2015 at 1:58

28 votes

Is the SLS irrelevant if the Falcon Heavy launch is successful this year?

answered Feb 26, 2015 at 12:50

28 votes

Accepted

Has there been any collision between two active spacecrafts?

answered Apr 7, 2015 at 11:19

26 votes

Accepted

Why is there a need for getting rid of ISS trash using the empty ATV and similar vehicles

answered Mar 28, 2018 at 16:14

25 votes

Why is the Falcon Heavy first launch being given such a risk of failure?

answered Feb 6, 2018 at 16:44

25 votes

What is the purpose of the jets of water often under rocket engines during launch?

answered Mar 3, 2014 at 13:30

25 votes

Accepted

How far would the STS get without the SRBs

answered Nov 9, 2014 at 1:43

24 votes

Why create a production line for the SpaceX Starship?

answered Mar 12, 2020 at 10:54

24 votes

Accepted

How will SpaceX achieve landing of the Falcon 9 first stage?

answered Jan 6, 2015 at 13:43

24 votes

Accepted

Why is the Angara rocket called eco-friendly?

answered Dec 23, 2014 at 13:51

24 votes

What caused the N1 to become a failure?

answered Apr 6, 2016 at 15:18

23 votes

Will SpaceX delay launches, if the landing site weather is unacceptable?

answered Jul 25, 2018 at 12:12

23 votes

Why does Virgin Galactic's SpaceShipTwo need a carrier airplane?

answered Jul 14, 2021 at 10:00

23 votes

Accepted

Why will Superheavy/Starship have a landing pad so close to the launch pad?

answered Jun 8, 2020 at 19:49

23 votes

Falcon 9 launch process - perception of launch speed

answered Jun 1, 2020 at 13:49

23 votes

Accepted

Will SpaceX attach its fairings to a booster to recover them?

answered Feb 16, 2018 at 17:18

23 votes

What happens to the Falcon 9 second stage after payload separation?

answered Jan 14, 2015 at 19:45

Stack Exchange Network

671 Answers

How can the reusable Falcon 9 succeed when the reusable Space Shuttle failed?

How do the sizes of the various proposed manned capsules differ?

Why are there no spacecraft rotating for artificial gravity?

Why were jet engines not used in place of the solid fuel in the STS SRBs?

What happens to defunct lunar and Mars rovers? What technological barriers prevent humanity from creating a perpetual rover?

Apollo command module space walk?

What makes 21st century fairings so valuable that they'd potentially be recovered and re-used?

Can a rocket be launched while it rains?

Why is Falcon 9's shape so tall and skinny?

For the Starship SN8 flight, did they lose engines in flight?

Why are three cosmonauts required to move a Soyuz?

Isn't Starship way too big?

More efficient SpaceX landings?

Why does SpaceX have a launch window for a pad abort test?

Is the SLS irrelevant if the Falcon Heavy launch is successful this year?

Has there been any collision between two active spacecrafts?

Why is there a need for getting rid of ISS trash using the empty ATV and similar vehicles

Why is the Falcon Heavy first launch being given such a risk of failure?

What is the purpose of the jets of water often under rocket engines during launch?

How far would the STS get without the SRBs

Why create a production line for the SpaceX Starship?

How will SpaceX achieve landing of the Falcon 9 first stage?

Why is the Angara rocket called eco-friendly?

What caused the N1 to become a failure?

Will SpaceX delay launches, if the landing site weather is unacceptable?

Why does Virgin Galactic's SpaceShipTwo need a carrier airplane?

Why will Superheavy/Starship have a landing pad so close to the launch pad?

Falcon 9 launch process - perception of launch speed

Will SpaceX attach its fairings to a booster to recover them?

What happens to the Falcon 9 second stage after payload separation?