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 and a crewed mission into orbit. See wiki for related tags.

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Will SpaceX use a special launch maneuver for the SAOCOM 1B mission?

Teslarati's SpaceX sets date for first Florida launch of its kind in more than half a century explains that something different will happen. For those that want to read the article first, I've used ...
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SpaceX Crew Dragon depressurization for emergency EVA

As far as I know, the Crew Dragon does not have an airlock. Therefore, if astronauts inside needed to go outside for some reason, they'd need to suit up, depressurize the cabin, and then they'd be ...
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What is producing these strange lights around the Falcon 9 grid fins (Starlink launch)?

Early in the video of the launch of the first sixty SpaceX Starlink satellites we can see that after stage separation the first stage grid fins open. Around that time there are some phenomena I don't ...
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SpaceX Canaveral launch question

In the past, I could see space shuttle launches from my front door on the gulf coast of Pinellas County by looking due east on a clear day or night. I have tried to catch SpaceX launches a couple ...
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Will a Cygnus and Dragon be on station at the same time in April 2019?

According to the launch schedule at the moment I looked (which is of course only a snapshot in time) there is a Cygnus mission (NG-11) scheduled for Apr 17, 2019. There is a SpaceX Dragon Cargo ...
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Calculating the height and width of a rocket for drag

While messing around with making a little rocket launch simulator, I seem to have hit a slight wall with finding the relevant information in order to calculate the width and height of the rocket for ...
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Does the 90 million cost for the Falcon Heavy include everything?

SpaceX says that it costs them 90 million each time to launch a Falcon Heavy, does this include fuel? If I where to purchase a Falcon Heavy launch, how much would it cost me to launch it, buying my ...
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What technology will SpaceX's StarLink satellites most likely use for sat-to-sat linking?

The question How does SpaceX plan to make money with StarLink Broadband? has got me thinking about how the satellites will link to each other. Wikipedia says it's something greater than 10,000 GHz and ...
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Falcon fairing half - between separation and parachutes deployment

How does Falcon fairing half behaves in atmosphere before parachutes deployment? What is its free fall attitude in atmosphere? Is the fairing's attitude stable (with some wobbling, but without ...
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Time For SpaceX to Plot Landing Course

How much time would it take for the SpaceX engineers/astrophysicist/other employees to plot the landing course for the reusable first stage rocket to land exactly on a 214 by 170 meter landing pad (or ...
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What kind of power is referred to in “the…most powerful all-electric propulsion communications satellite ever produced”

The Florida Today article On second flight, SpaceX Falcon 9 rocket to launch 'brute' of a satellite from Cape describes the upcoming SpaceX launch of SES-12. Next to this tiny image of (presumably) ...
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What's up with Star Man's Roadster's suspension?

On Earth, a vehicle's weight compresses the suspension, and the wheel rims are generally designed to closely fit the contour of the tires with only a small gap between. Take away that weight, the ...
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For a cubesat mission piggybacking on a Red Dragon, what are the tradeoffs for launch early and late in the launch window?

SpaceX will be launching two Red Dragons in 2020, one at the beginning of the launch window (July) and one at the end (September). For a CubeSat mission that would have to piggyback on one of the two ...
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How big are the risks of Starship flipping during or after landing on the Moon?

Now that NASA has announced the selection of SpaceX to manufacture the Moon landing vehicle(s) for the Artemis program, I can't but notice how tall Starship is when compared to other concepts. Chances ...
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Will i be able to see the SpaceX tonight launch from Ocala, Fl?

Im currently in Ocala, FL and SpaceX launches a rocket tonight (March 9th) from Cape Canaveral. Will I be able to see it given the proper conditions?
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Spacecraft that can be used for microgravity missions and experiments

Do you know any of spacecraft that can be used for microgravity missions and experiments? Nowadays it`s rather popular and useful to use uncrewed guided space vehicles for particular microgravity ...
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Superheavy assisted trip to Mars

i just had a thought and wonder about feasability, cost and possible implications. What I assume is the plan: A Superheavy pushes Starship into Orbit. Cargo Starships follow and refuel. Fueled up ...
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Design impact on Chamber pressure

What is forming the amount of chamber pressure which is produced in a rocket engine and why would you like to have an higher chamber pressure? I was calculating the SpaceX Raptor engine for myself, ...
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Any large scale rocket static fires, like SpaceX's 3 in one day?

SpaceX on Jan 13, 2021 did three static fires in one day. Elon Musk tweeted: All three static fires completed & no RUDs! And that was in response to this tweet of his own: Today at SpaceX is ...
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Methane or LOX tank at Boca Chica

As we can see on this picture from Mary "@bocachicagal" on NASASpaceFlight, there are two types of tank near the test stand. Some are black and others are white or bright and shiny metal, ...
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What is the maximum thrust a pressure-fed methalox engine can produce?

SpaceX revealed on 4/30/2020 a new version of Starship designed to land humans on the Moon. Auxiliary engines are mounted high on the body for the last part of the descent, apparently to eliminate the ...
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What is the surface area of Falcon 9 payload fairing?

what is the external surface area of the payload fairing of the Falcon 9 ?
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Satellite spotting

My normal activity in early morning and evening is to count how many satellites I can spot which is between 5-7. At 6 am on 22nd November I counted 51 all in single file some 3 abreast; it was ...
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What object is visible in the background of the Dragon view from the CRS-17 launch?

In the livestream of the CRS-17 Mission, at 28:02 into the livestream (T+13:02) there is a flashing object visible in the bottom, left third of the screen. This object moves "up" in the frame. It is ...
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Speed needed for the ship to escape Mars, on The Martian movie

Based on the two speeds and altitudes that are presented in the movie: "The Martian" which are respectively 741 m / s and 1350m, 850 m / s and 1843 m I would like to prove with calculations whether or ...
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Was there a thunderstorm in Florida during the Crew Dragon Demo 1 launch?

The video from SpaceX this morning shows a number of red flashes in the sky at T-00:20:34, T-00:09:36, T-00:04:50 and T-00:02:15. The most noticeable was at T-00:04:50. These flashes look like ...
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What light was the Falcon 9 grid fin occulting in todays SpaceX Nusantara Satu Mission live broadcast?

What light was the Falcon 9 grid fin occulting in todays SpaceX Nusantara Satu Mission live broadcast? I backed up the time slider on the YouTube live broadcast and snapped some screen captures, ...
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What are some drawbacks of Automated Flight Termination Systems (AFTS) sometimes called Automated Flight Safety Systems (AFSS)?

I often read about how AFSS is the the next big part of the range of the future, and how it is a tremendous improvement upon the current system. But I never really read about the drawbacks. No system ...
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144 views

Details about the BFR abort procedures?

What kind of emergency procedures will the BFR have during landings? I can see an abort to an alternate landing zone but what about when you have a an emergency ten seconds after engine shutdown?
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Temperature indicators/labels on space debris?

There was a picture in this question about space debris on shore. Seems to be a part of a Falcon 9. The round stickers are used for temperature control. Similar labels are sold by some companies, for ...
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Could the Starman/Roadster spacecraft have targeted a well defined heliocentric orbit if it had wanted to?

Does the FH upper stage have things like inertial guidance, star cameras, GPS/GNSS, and/or other helpful equipment that would have allowed it to do careful thrust vectoring during the 3rd and final ...
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How much fuel is necessary for 2nd stage of Falcon 9 rocket to land?

What is the fuel mass nedeed for the 2nd stage of Falcon 9 rocket to land, how much compared with its total fuel mass that it has? Or how much delta-v is necessary? Would it be able for Falcon 9 to ...
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Does a low-orbit communication network drive a sustainable launch market?

With SpaceX recent announcement of a huge satellite network in low earth orbit, I was wondering if such a network would motivate a sustainable large-scale launch capacity, i.e. a increase of scale of ...
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What makes this shadow pattern on the 2nd stage nozzle SpaceX JCSat-16?

I think it may be related to the sun, but I don't understand the "tooth" shape in the GIF - is this a shadow of something? Is the spacecraft already spinning for the satellite deployment? What are ...
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How will SpaceX land its rockets on the unleveled surface of Mars?

SpaceX plans to send the Starship to Mars and to land it there, tail first in a vertical position. Unlike the Perseverance rover, which seems to be able to land on uneven terrain without the need for ...
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How much krypton do Starlink satellites carry when they are first deployed?

Starlink satellites use krypton as propellant. This answer roughly estimates 2.3 kg of Krypton based on a total delta-V of 190 m/s and an exhaust velocity of 20,000 m/s. But how close is that to ...
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Avionics Systems on board Falcon 9 (Reusable)

What kind of control systems are active and how do they function on board a Falcon 9 booster while it's landing ?
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How to view the Feb 6, 2018 Falcon Heavy launch?

Will the Feb 6, 2018 SpaceX Falcon Heavy launch from KSC be visible in Boca Raton/ Deerfield Beach area? Is there a good site for determining viewing ranges for launches?

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