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Questions tagged [spacex]

Space Exploration Technologies Corporation, or SpaceX, is a private space exploration company. It was the world's first privately held company to successfully launch a cargo mission into space , cargo to the ISS (International Space Station), land and reuse a booster, and a crewed mission into orbit. See the wiki for related tags.

35 votes
1 answer
10k views

Why does the Falcon 9 consume hydraulic fluid?

According to many news articles, the crash of the Falcon 9 during landing on 1/10/2015 was due to running out of hydraulic fluid for the steerable hypersonic grid fins. This was seemingly confirmed ...
pbristow's user avatar
  • 453
34 votes
8 answers
9k views

Why not land SpaceX's Starship like a plane?

I get the reasoning behind designing Starship to land upright. It doesn't require landing gear and the turnaround is expected to be much faster. But I'm beginning to question that logic. I think the ...
loweryjk's user avatar
  • 457
34 votes
6 answers
21k views

Why did SpaceX attempt to land the booster on a barge instead of somewhere on land?

I understand the benefits of reusability for the rocket booster. But I don't understand why they're landing it on a barge. I've read tons of articles about this but not one has even hinted at an ...
user avatar
33 votes
2 answers
10k views

What holds SpaceX’s rocket in place in this launch?

On a recent launch video, the gantry is at an angle and only loose tethers are attached as the rocket is prepared for launch. What is keeping it upright and in place at this point? The engines haven'...
MarsJarsGuitars-n-Chars's user avatar
33 votes
3 answers
7k views

Why is there any launch window at all for the Falcon Heavy test flight?

Why is the window only ~3 hours long, why not 2? why not 5? why not "until it launches"? I'm guessing range safety, they could only get a TFR that long?
Sam's user avatar
  • 600
33 votes
4 answers
6k views

Will the Falcon Heavy be far enough in 12 seconds to not cause damage?

Elon Musk has stated that he will consider it a success if the Falcon Heavy gets far enough away from the launch pad to not cause damage if it blows up. The Falcon Heavy underwent a 12 second static ...
PearsonArtPhoto's user avatar
  • 121k
32 votes
4 answers
7k views

Is it possible to track an object as small as the Tesla Roadster around the Solar System

I have heard that we will soon lose track of the Tesla Roadster launched with the Falcon Heavy test launch. Yet, we know where Voyager is out beyond the Solar System and we followed other satellites ...
Dan Sorensen's user avatar
  • 3,581
31 votes
3 answers
15k views

Why does the SpaceX Falcon 9 rocket do a 180 flip for reentry?

I am very new to the rockets and this can be a very dumb question, just that I am not sure if my understanding here is right? All of the rockets engines are at bottom which help it take off and ...
KP.'s user avatar
  • 421
31 votes
7 answers
7k views

Why is SpaceX not also working on a smaller version of Starship?

SpaceX is planning to retire Falcon 9, which would leave it with only Starship. While a Starship launch is expected to be cheaper than a Falcon 9 one, a downscaled Starship launch would be cheaper ...
Stephane Bersier's user avatar
30 votes
6 answers
12k views

Isn't Starship way too big?

The Shuttle was designed with a huge payload of 20 tons. This was supposed to not be a problem since: the reusability would drive down costs until satellite operators dropped expensive space hardware ...
Abdullah is not an Amalekite's user avatar
30 votes
3 answers
5k views

Could a Falcon Heavy test flight be responsible for these observations?

We observed a bright, slow moving (in our view for several minutes) large object that eventually left large bright contrails. This was over Northern New Mexico at around 7:29 PM MST. The object was ...
MT Hensley's user avatar
30 votes
3 answers
7k views

Why won't they recover the Falcon 9 from CRS-14?

According to the upcoming livestream of SpaceX CRS-14 (resupply of ISS): SpaceX will not attempt to recover Falcon 9’s first stage after launch. Why not? Wasn't that the whole point of (among ...
Mast's user avatar
  • 601
30 votes
2 answers
17k views

What is a thrust puck on Starship?

Elon Musk recently mentioned a Thrust Puck on Twitter, "We’re stripping SN2 to bare minimum to test the thrust puck to dome weld under pressure, first with water, then at cryo." He also mentioned ...
PearsonArtPhoto's user avatar
  • 121k
29 votes
4 answers
2k views

What started the explosion on the crashed Jason-3 stage landing on the barge?

If you watch the truly awesome video of the Jason-3 first stage landing on the ASDS Barge Just Read The Instructions, it is pretty clear that for one thing, they landed it. Then the leg gave out, ...
geoffc's user avatar
  • 80k
29 votes
2 answers
5k views

Why do Crew Dragon astronauts need to climb up one level using the stairs before ingress?

While watching the launch of SpaceX Crew Dragon, I noticed that, once the astronauts came out of the elevator in the fixed service structure, they had to 'climb up' one level using the stairs, before ...
Vishnu's user avatar
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