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.

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Where is the statement from the FAA about the second mishap investigation of Starship being now closed?

I got very excited recently when I heard from serval sources (1, 2, 3, 4, 5,…) that the mishap investigation of the second Starship launch is now closed. However, when I was looking for a primary ...
The Rocket fan's user avatar
-3 votes
0 answers
56 views

"Space navigation through wormholes." [closed]

I'm doing a scientific magazine about the possibility of traveling in time through wormholes. For my second variable, I need evidence of a discussion forum. Pls help me share your opinion and beliefs ...
Gabriel Capistrán's user avatar
9 votes
2 answers
2k views

Why does the Falcon 9 first stage perform a burn at 60 km altitude?

When falling back to Earth, why does the Falcon 9 first stage perform a burn at about 60 km (37 mi) altitude during re-entry instead of performing a longer burn closer to the drone ship? Would it have ...
Old Man John's user avatar
4 votes
1 answer
104 views

What (if any) modifications would SpaceX raptor engines need to run on liquified natural gas LNG?

Natural gas is 97% methane. Most of the rest is low molecular weight alkanes (hydrocarbons which would be at home in RP-1), along with a little CO2, H2S, N2 and He . Could Raptors run on straight ...
Woody's user avatar
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3 votes
1 answer
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What is the point to point suborbital payload of the SpaceX super heavy starship combination for Earth

I see multiple mentions of point-to-point transport use of the Super Heavy and Starship combination, but cannot find ANY estimate of how much cargo, how many people, or some combination thereof, is ...
user53409's user avatar
-3 votes
1 answer
89 views

Query about the spark from the movie Avatharam [closed]

The Telugu movie Avatharam, depicts an object resembling a meteor or comet with an interesting tail seen here from 24:49 to 30:00. Have we encountered (or there a theoretical basis for believing that ...
Unrevealed User's user avatar
7 votes
1 answer
179 views

Does SpaceX clean the outside of Dragon between flights?

We see that for the first stage, Falcon 9 boosters, SpaceX barely cleans the soot off. (Generally the soot comes from flying through the engine exhaust of boostback, reentry, and landing burns.) The ...
geoffc's user avatar
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4 votes
1 answer
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splashdown time Dragon vs Soyuz

Why did it take 3 days for dragon since detach from ISS till splashdown - while Soyuz would take 3 hours ?
user53342's user avatar
5 votes
2 answers
225 views

Is it possible to use the Starlink laser mesh network for science? What kind?

In the news there was an article about Starlink beaming 42 million GB of Data per day. Also it states that the lasers form a global mesh network of 9000+ lasers. There are 260.000 acquisistions per ...
twildeman's user avatar
  • 151
-4 votes
1 answer
119 views

What Kind of Space Problems Do You Solve with Python and other prosaic software tools? [closed]

In looking at different job listings for space companies, I see some tools which are obviously specific to aerospace and high-end engineering, but also a lot of very run of the mill software skills ...
Chris B. Behrens's user avatar
4 votes
1 answer
244 views

Starlink Dishy parameters and satellite recognition

I have two questions: What are the antenna parameters of Starlink dish antennas (like antenna gain, directivity, etc)? Is there any way for me to know which satellite my Starlink dish is ...
babibooooooo's user avatar
2 votes
0 answers
82 views

How to Analyze and Size Spacecraft Structures: Loads Development & Structural Dynamics

Hello, I'm a mechanical/aerospace design engineer trying to expand into structural analysis. What I'm looking for: A guide or summary as to 1) how spacecraft design loads are determined, and 2) how ...
Retsied's user avatar
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What are the prelaunch procedures that astronauts follow before the launch?

What procedures do the astronauts follow, like the suit-up procedures and communication checks that happen before the launch. And how will the astronaut's family meet the astronauts prior to the ...
Ranjith's user avatar
  • 11
2 votes
1 answer
108 views

Is vacuum created between the inner engines under Earth's atmosphere that could affect the booster in the early moments of the ascent?

The booster has a lot more engines than the Starship. My thoughts are that if there's isn't a pressure relief to the innermost engines they could create a vacuum pulling the hot gasses expelled. I ...
Andrea S's user avatar
10 votes
2 answers
2k views

Wouldn’t Super Heavy flip following stage seperation, even without help from its 3 lit engines?

At 1:40 on the SpaceX launch commentary, the announcer said that after hot staging, “the three engines still firing on Super Heavy will flip the booster around”. With empty tanks, the center of mass ...
Woody's user avatar
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1 vote
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Scattering of exhaust gases during Starship IFT-2 hot staging

Various footage of the IFT-2 of SpaceX's Starship show intriguing pattern of, presumably, exhaust gases illuminated by the Ship's 3+3 engines (attached below). While this may be an optical illusion, ...
P Marecki's user avatar
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1 answer
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Why Spacex Starship is not a modular rocket?

The past Nov 18 was the last launch, of Starship. The things didn't happen as planned. But all of us know that soon or later Spacex will make it a successful. It will be a long time before it can be ...
user2232395's user avatar
2 votes
1 answer
127 views

How does SpaceX get its boosters from the ASDS to SLC-40?

Getting a freshly-landed booster from a drone ship to pad 39A seems straightforward: there's a deepwater channel from Port Canaveral to a dock next to the VAB. Sail the ASDS up, lift the booster off ...
Mark's user avatar
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4 votes
1 answer
449 views

Who is manufacturing the solar panels for Starlink satellites?

I am trying to understand the supply chain behind the Starlink Satellite Constellation. I am wondering how SpaceX is able to source those many solar panels. If somebody could give a brief explanation, ...
Bharath Simha Reddy's user avatar
40 votes
4 answers
13k views

Before we build a Mars colony, why don't we build a 100% self-sustainable test colony in the Antarctic?

Before we go to Mars, why don't we build a sealed dome self sustaining colony in the Antarctic? One that can heat itself, recycle all materials, water and waste. Grow enough plants to produce oxygen ...
Bretton Ferguson's user avatar
1 vote
0 answers
121 views

What's the reason behind SpaceX's timing of launching Starlink satellites?

I noticed a pattern in the timing of Starlink launches: In the first half of each year, Starlink launches occur rather during the day, and in the second half, they occur rather during the night (...
Hannes's user avatar
  • 189
-4 votes
1 answer
227 views

How does SpaceX prevent fuel from cluttering together in zero G [closed]

What is the solution to stop fuel inside starship collecting in center of the tank during zero G flight? Here is a rough sketch of starship with rudimentary diaphragm system to control flow of fuel ...
levis springer's user avatar
11 votes
4 answers
6k views

Why would astronauts need a wristwatch and a separate timer?

Watching this image used in this question Why would astronauts in SpaceX's Crew Dragon need two separate timing devices: one portable digital timer, and one wristwatch, rather than carrying into orbit ...
user721108's user avatar
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5 votes
1 answer
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Are the things I'm seeing satellites?

I have seen objects that look like satellites, but there are many of them, and they move in one direction in a straight line. Can someone help me to understand what they are?
War Thunder's user avatar
1 vote
1 answer
2k views

Why was Booster 9's 29 engine static fire ended 2.36 seconds early? [duplicate]

Suggested by Darth Pseudonym in answer to my other similar question. Recently (August 7), Booster 9 conducted a static fire test where it shutdown after only 2.74 of the planned 5 seconds of burn ...
Starship - On Strike's user avatar
3 votes
1 answer
2k views

Why were 4 engines shutdown prematurely during Booster 9's static fire?

Recently (August 7), Booster 9 conducted a static fire test where it only ignited 29 of 33 engines. This is the big static fire, there not another one. I have found that they were shutdown prematurely ...
Starship - On Strike's user avatar
3 votes
0 answers
226 views

What advantages will Rocket Lab's Neutron have over the Falcon 9?

With Neutron's debut coming up next year, are there any advantages of Rocket Labs design over SpaceX's Falcon 9 FT? The most obvious I can see are the attached fairings, but certainly with all the ...
David's user avatar
  • 1,001
3 votes
1 answer
171 views

What was the size of the SpaceX team in 2006?

I know a previous question has been asked for the team in 2008 (first successful launch of the Falcon 1). However, reading Ashlee Vance' s book on Elon Musk, I came accross this paragraph: With that ...
gbf29's user avatar
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10 votes
1 answer
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Does SpaceX expect 1 collision involving one of their Starlink satellites every 2 years?

I read on https://gizmodo.com/spacex-starlink-satellites-dodge-137-objects-daily-1850616506 by Passant Rabie: A new report revealed that Starlink satellites had to make 25,000 collision avoidance ...
Franck Dernoncourt's user avatar
3 votes
1 answer
813 views

How does the current or future network latency of SpaceX Starlink compare to wired internet?

When reading about SpaceX Starlink, high frequency stock traders are mentioned as a potentially lucrative customers, this is because satellite to satellite communications don't have glass between them ...
moshevi's user avatar
  • 479
7 votes
5 answers
5k views

Why doesn’t SpaceX sell Raptor engines commercially?

I have never studied rocket science and am just curious about this. I would assume one Raptor 2 engine could launch a small rocket to space. I heard they are able to make them for less than a million ...
user51440's user avatar
3 votes
2 answers
258 views

SpaceX Falcon Reusable First Stage Innovations

What are the top five innovations that SpaceX was able to accomplish that allows the first stage to land vertically and be reused? I am sure the Apollo program would have liked to reuse their first ...
still_learning's user avatar
4 votes
3 answers
2k views

Could Falcon 9 push the second stage a little longer after MECO and before separation?

When watching Starlink launches I noticed the MECO/stage separation usually occurs at about 2m30s with the speed of about 8000 km/h and altitude about 65 km. After the separation the first stage with ...
Endrju's user avatar
  • 159
8 votes
1 answer
3k views

Will spaceX crewed boosters have a self-destruct mechanism?

SpaceX's most recent launch went awry and they triggered the self-destruct. Crewed missions have a launch escape system which is a high-thrust rocket that can get the capsule clear of the main rocket ...
Kevin Kostlan's user avatar
-2 votes
1 answer
342 views

Why wasn't SpaceX heavy rocket tested thoroughly on ground before being sent to space?

I do not know how much testing SpaceX did before launching their heavy rocket but it to blow up 3 mins later and call is a success seems a bit misleading. I understand they gathered data but to what ...
Sam B's user avatar
  • 137
18 votes
6 answers
7k views

Why was Space X's Starship blown up?

I understand that thousands of small rocket fragments will cause less damage when they fall than an intact rocket. But at the time Starship was detonated, I believe it was over the ocean, and not ...
Ryan_L's user avatar
  • 1,042
9 votes
2 answers
2k views

For the 4/20 Launch of Starship does anyone know what was inside starship?

I was curious to know if they built rooms or had dummies inside, or what they put in it to simulate weight.
shotsimon's user avatar
0 votes
1 answer
133 views

Why does SpaceX's integrated booster test not attempt to relight the second stage engines

Starting an engine in a vacuum under microgravity conditions is really difficult to test on Earth. Why isn't the first stage test being used to gather data for this?
JCRM's user avatar
  • 693
-4 votes
2 answers
352 views

Why SpaceX decided to forgo the opportunity of a mock soft-landing (on water) for Super Heavy?

The first test flight would be a great chance to test vertical landing controls in the 'first stage' and maybe save some engines for after the flight examination. Source: CNN "Less than three ...
TheMatrix Equation-balance's user avatar
0 votes
0 answers
122 views

Why did the May 2016 Falcon 9 launch have a radar glitch?

Looking at a chronicle of booster landing failures, in May 2016 the landing legs appear to have had a radar glitch. This then damaged them. So, my question is why did this happen?
Starship - On Strike's user avatar
1 vote
1 answer
267 views

Where and how many RCS thrusters are installed on Starship?

Starship from SpaceX will soon launch. During the 10 km test it used RCS thrusters to flip itself in the right position. On the website it mentions how important it is to use air friction to slow down ...
The Rocket fan's user avatar
3 votes
1 answer
238 views

When chopsticks catch the booster by the grid fins, what is the maximum vertical speed?

How much vertical speed can the grid fins handle before breaking off?
Star-SpaceX's user avatar
4 votes
1 answer
491 views

How does SpaceX get through regulatory issues so quickly?

"Regulatory" isn't the right word, but I don't know what is. For example, SpaceX seemed to be able to prove to NASA's satisfaction that they were sufficiently safe to use for crewed launches ...
fectin's user avatar
  • 979
0 votes
1 answer
131 views

What caused the falcon booster landing failure during the CRS-16 mission?

On December 5, 2018 the Falcon 9 booster started spinning during the landing burn, and promptly appears to have soft landed on the ocean. While SpaceX stated that the booster could be reused it never ...
Starship - On Strike's user avatar
0 votes
1 answer
226 views

Are Falcon Heavy fairings reused?

I heard a lot about SpaceX reusing the fairings from the Falcon 9. Do they/ are they planning to do the same for Falcon Heavy?
Starship - On Strike's user avatar
5 votes
1 answer
265 views

Why did the June 2016 SpaceX launch run out of propellant?

In other words, what caused SpaceX to miscalculate the amount of propellant required to safely land the booster. They had landed successfully on the drone ship in April. So what went wrong here? What ...
Starship - On Strike's user avatar
4 votes
1 answer
281 views

Does a RTLS (Return To Launch Site) landing deposit more soot on the booster than a drone ship landing?

First, it performs an extra burn (the boostback burn). Does this burn make a credible source of extra soot? Second, sometimes it appears to have flown through the second stage's exhaust plume. Does ...
Starship - On Strike's user avatar
4 votes
1 answer
179 views

Has Spacex released any reports describing how they are going to secure the payload on Starship?

SpaceX has announced that Starship will be able to lift around 100 to 150 tons of cargo into Leo. When the spacecraft is landing or taking off you don’t want the payload just floating insecurely in a ...
The Rocket fan's user avatar
3 votes
1 answer
234 views

How can you find out how many times a SpaceX fairing has been reused?

For the past few years, SpaceX has been reusing there fairings. While on some SpaceX webcasts they tell you, others they dont. Is there a way to find out how many times judging from how they appear? ...
Starship - On Strike's user avatar
2 votes
1 answer
250 views

Why do the Falcon 9 fairings have soot on them?

On nearly every SpaceX webcast since 2020 they explain that the Falcon 9 booster has soot on it because, during the entry burn, it flies through its own exhaust plume very quickly depositing the ...
Starship - On Strike's user avatar

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