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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.

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Why would Starlink launch appear as a blurred line?

I believe that I recently saw a Starlink launch (details below in case I am mistaken); what puzzled me was that it appeared as a blurred, hazy line or streak. I watched it move across the sky and at ...
David I's user avatar
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3 votes
0 answers
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Does Starship run on Slushies?

Cryogenic slush (a mixture of liquid and solid) can potentially store propellants at higher density than cryogenic liquid. For instance, hydrogen slush is 16-20% denser than liquid hydrogen. https://...
Woody's user avatar
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4 votes
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Is Elon’s “Idiot Index” an over-simplification?

Edit: this question was originally closed because it is "not related to space exploration". However, SpaceX's major achievement is reducing the launch cost for space exploration. Elon ...
Woody's user avatar
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19 votes
2 answers
3k views

Why some USA launches are visible in Europe

Yesterday (2024-05-02) at night I saw a SpaceX rocket from my home in Lithuania (Europe) for the second time in my life. It was Falcon 9 second stage carrying two "Maxar" satellites launched ...
Ernis's user avatar
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10 votes
1 answer
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Do the second stages for Starlink launches from Florida do a deorbit burn over Texas?

This article about "strange red glows over Texas" claims that for Starlink launches from Florida, the second stages do a deorbit burn over Texas resulting in a South Atlantic Ocean impact. ...
Organic Marble's user avatar
2 votes
0 answers
64 views

Does SpaceX post their planned trajectories publicly?

I live in a location where SpaceX launches are sometimes visible. I know SpaceX posts planned launch times, but does it provide any information about the flight trajectory to the public? I would ...
Cort Ammon's user avatar
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5 votes
1 answer
352 views

Would Starship do a direct descent into the atmosphere and aerobrake or do a capture burn before aero braking

Due to re-entry heating and the sheer velocity when coming in from solar orbit into the Earth's SOI, will Starship do a capture burn to slow it down before entering the atmosphere or just go for a ...
Lawn Hollander Lawn's user avatar
2 votes
3 answers
5k views

Could SpaceX ever make a Heavy version of Starship Super Heavy

As of now, SpaceX is preparing for Starship Flight 4, and once starship is mature enough and achieves Elon Musk's goal, will they make a Heavy version like with Falcon. Even Before Integrated flight ...
Lawn Hollander Lawn's user avatar
4 votes
2 answers
260 views

Will a human mission to Mars require artificial gravity?

Elon Musk and SpaceX are planning a manned mission to Mars as early as 2029. The mission timeline is unclear, but one proposal (page 16) from SpaceX, which uses Hohmann transfer orbits for minimum ...
Galerita's user avatar
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3 votes
1 answer
340 views

Feasibility of landing all 3 Cores of the Falcon Heavy on Droneships [duplicate]

All of the Falcon Heavy launches up to now are either expending the Center core and landing the side boosters on land, or expending all of them (some examples: Falcon Heavy test flight, both boosters ...
Lawn Hollander Lawn's user avatar
1 vote
2 answers
299 views

Feasibility of landing Starship's Super Heavy booster on a droneship

Recently, after IFT 3 of Starship Super Heavy, I went to ponder: Can SpaceX land their Super Heavy boosters on Autonomous Spaceport Droneships to get extra performance. Currently, it separates with ...
Lawn Hollander Lawn's user avatar
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1 answer
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Landing Zones 1 and 2 in Cape Canaveral and yet launching from KSC?

On Google Earth, I saw Cape Canaveral and Kennedy Space Center (KSC) are separate sites. However, I do not understand why SpaceX lands it's boosters on LZ 1 and 2 at Cape Canaveral but launches them ...
Lawn Hollander Lawn's user avatar
23 votes
5 answers
8k views

What is SpaceX doing differently with their Falcon 9 so that it doesn't cost as much as the Space Shuttle?

SpaceX has been launching and reusing their Falcon 9 for very cheaply quite often. Even though it is quite revolutionary, it is isn't the first time a rocket has been reused. The Space Shuttle side ...
User1's user avatar
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2 votes
1 answer
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Why did SpaceX decide to change their Starship names from SN to just S?

Before S20, all of the SpaceX prototypes were called SN (Serial number) and then just a number. For example, the most know one was SN15 which successfully touched down after flying up to 10 km. ...
The Rocket fan's user avatar
2 votes
1 answer
132 views

Is this line in the SpaceX livestream engine exhaust?

In the livestream of the recent mission CRS-30 from SpaceX, one could see a vertical line going up. However in other camera shots it was not visible. Was this line the engine exhaust or was there some ...
The Rocket fan's user avatar
2 votes
2 answers
197 views

Will there be a controll mechanism to keep spacex starship in a controlled position during coasting and/or reentry?

Looking at the really interesting imagery from Starship Flight 3, it is obvious that Starship is rotating (tumbling-ish) during coasting, and also during the initial reentry phase. The plasma streaks ...
Roger Wallberg's user avatar
7 votes
1 answer
1k views

What is the debris that occasionally flew off Starship during its coasting phase today?

I was thrilled to watch the 3rd test flight of SpaceX Starship today. One thing I noticed watching the video was that debris came off the ship. This was more noticeable during its coasting phase. Some ...
Brian Rak's user avatar
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8 votes
1 answer
707 views

How is SpaceX planning to avoid fuel sloshing on IFT3?

SpaceX is about launch IFT3 and during IFT2, the booster exploded probably due to sloshing and an engine having something block its fuel supply. What has SpaceX changed to avoid fuel sloshing?
User1's user avatar
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0 votes
1 answer
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Does Raptor rocket engine of SpaceX include a cracker or fuel conversion system to crack the hydrocarbon fuel into its constituents?

In the Raptor rocket engine, where is the hot turbine exhaust gas transferred, when gaseous fuel arrives from the heat exchanger? Does the Raptor rocket engine include a cracker or fuel conversion ...
Lakshay's user avatar
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2 votes
1 answer
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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
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
119 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
165 views

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
96 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
198 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
218 views

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
281 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
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-4 votes
1 answer
129 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
316 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
96 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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1 vote
0 answers
102 views

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
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2 votes
1 answer
111 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
0 answers
140 views

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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4 votes
1 answer
335 views

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
168 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
907 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
39 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
141 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
235 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 ...
user avatar
5 votes
1 answer
5k views

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
249 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
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3 votes
1 answer
187 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
  • 33
10 votes
1 answer
4k views

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
948 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
272 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

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