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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How can the Starship booster stand vertically without falling over?

How can the Starship booster stand vertically without falling over? In my day to day experience, similar long objects (simple objects that can be easily found in thehouse) tend to fall easily with a ...
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How will SpaceX's Starship accommodate its 100 passengers from the effects of micro-gravity?

According to this Wikipedia article, Starship will take on average 115 days (3.8 months) to get to Mars and 150 days maximum (4.9 months). with an average trip time to Mars of approximately 115 ...
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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 ...
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How did SpaceX carry out livestreams initially? [closed]

The thing that probably captivated many of us here were the videos of the Falcon heavy boosters landing back perfectly. How would one build a similar setup?
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Are SpaceX new space suits inferior to existing ones in terms of usability?

There is an article in Russian "Why do the American space suits look so different from Russian ones?" which claims that the new SpaceX suits are designed for looks, and have several issues, which, ...
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Does the US government plan to issue “Astronaut Wings” for anyone passing 80 km forever?

Related and potentially helpful here: What kind of badge will tourists who performed a sub-orbital spaceflight receive? but here I'm asking specifically about the US government's future plans. The BBC'...
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How to understand “rat” moving on Falcon 9 second stage rocket nozzle?

Starting at about ten seconds into this video of the SpaceX CRS-19 launch: One can observe what looks something like a rat moving around the side of the second-stage ...
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1answer
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Puzzler; what can we learn about the distance and direction of Earth from this cool SpaceX-tweeted image of Earth and a vacuum nozzle?

The 18-June-2021 Spacex-tweeted below says: View from Falcon 9's second stage Merlin Vacuum engine There is information out there about the approximate exit diameter and length of the nozzle and ...
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Why SpaceX have only one planned potential launch of F9 on their July manifest?

Why SpaceX have only one planned potential launch of F9 on their July manifest. https://en.wikipedia.org/wiki/List_of_Falcon_9_and_Falcon_Heavy_launches It show only one potential F9 launch from ...
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Is or was STARGATE really being used for SpaceX launches at Boca Chica or otherwise?

The 2015 answer to For SpaceX's Texas launch site, what kind of range radar/tracking will they have? links to The Spacecraft Tracking and Astronomical Research into Giga-hertz Astrophysical Transient ...
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Is Starship planned to fly directly to the ISS without first stage? Is it even possible?

I'm having difficulty understanding how/if Starship and/or Super Heavy could be used to deliver crew to LEO. Is it expected to deliver astronauts to the ISS Crew-Dragon-style, but without the 2nd ...
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Keep a 2nd stage in orbit and refuel [closed]

Why does SpaceX not develop a second stage that can be used to meet with a first stage to pick up payload and refuel, thus transporting goods to orbit repeatedly instead of being used only once?
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How could Starship “deep space variants” improve payload performance by “orders of magnitude” (Elon Musk)?

Replying to Scott Manley's tweeted table of payload mass for a given geocentric C3, Musk tweeted: We could stretch the Falcon Heavy upper stage & increase this a lot, but FH already covers all ...
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How many SpaceX 2nd stages are in heliocentric orbits?

I can think of one particularly famous SpaceX 2nd stage in heliocentric orbit that even has its own website: https://www.whereisroadster.com/ and I know one was used to send DSCOVR towards Sun-Earth ...
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Why does the F9 second stage roll back and forth during deployment of each RADARSAT satellite?

GIF Watching the SpaceX video RADARSAT Constellation Mission after T+ 52:00 we can see at least the first two satellites deploy. In each case, the second stage ...
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How do SpaceX intend to transport their starship/super heavy?

One of the design constraints of the Falcon 9, its skinniness, is to allow it to be transported by truck back to the launch site. Falcon 9 is 3.7 metres in diameter, whereas Starship and the super ...
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Just how “unreasonably gigantic” was the exclusion zone for the scrubbed SpaceX's Transporter-2 Mission first attempt?

Watching Transporter-2 Mission, currently after 15:02 in the video (after an extended hold at T-00:00:11) I heard a voice say: ...
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Do space transportation firms such as SpaceX receive a financial compensation if a launch is cancelled because of an airplane entering the launch zone

I read on https://arstechnica.com/science/2021/06/spacex-to-launch-second-rideshare-pressuring-small-launch-industry/ (mirror 1, mirror 2): The countdown clock got to T-11 seconds on Tuesday ...
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Does NEPA currently categorically exempt satellite systems? Is there any legal basis to Viasat's request for the FCC to consider light pollution?

Space News' Viasat asks FCC to halt Starlink launches while it seeks court ruling says: Viasat formally asked the Federal Communications Commission to stay an April 27 license modification that ...
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No need for gravity assist with Falcon Heavy?

Elon Musk is quoted to have said, after the launch of Falcon Heavy, that «it can launch things direct to Pluto or beyond, no stop needed, don’t even need gravity assist or anything». Now, I am not an ...
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Which Launching State HASN'T breached its obligations under the 1976 Registration Convention?

(the wording of my question above is voluntarily provocative, but the actual question below may be even more) The context: The 1976 Registration Convention is part of a set of Treaties that ...
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SpaceX live broadcast of booster & boat's eye view of the GPS III Space Vehicle 5 were both uninterrupted; have they make some upgrades to the system?

This answer to Why does the video feed always fail during Falcon 9 landings? shows that SpaceX seems to be "getting better at" or "less shy about" broadcasting continuous live ...
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Why does the video feed always fail during Falcon 9 landings?

I'm in love with SpaceX and Falcon 9, I watch every live stream and the most special, most amazing, most thrilling part of each launch is the 1st stage landing. Seeing the smoke (or vapor) clear and ...
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What is Falcon heavy's payload capacity to Trans-Lunar Injection

According to the SpaceX website (http://www.spacex.com/falcon-heavy) the falcon Heavy can carry 16.8 tons to Trans Mars Injection (TMI) and 26.7 tons to Geostationary Transfer Orbit (GTO). How much ...
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What is this 'engine plume interaction'?

SpaceX just released this high-speed footage, writing in the comments: Missions in order of appearance: May JCSAT-14; July CRS-9 launch, stage separation, engine plume interaction, and re-entry ...
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Why is the center engine in the Falcon 9 (and Falcon Heavy) Octaweb layout at a different elevation with respect to the outer engines?

Looking at this elevation view of the Falcon 9, the nozzle exit of the core engine in the cluster is in a different plane with respect to the nozzle exits of the surrounding eight engines. Why is ...
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What are the differences between a standard Merlin engine and the Merlin Vacuum engine?

I know that there's a difference between SpaceX's Falcon 9 1st stage engines and the 2nd stage engine, since that stage is specifically tuned for vacuum. Wikipedia also says that the Merlin Vacuum ...
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Why will Starlink satellites use krypton instead of xenon for electric propulsion?

The press kit for the first Falcon 9 Starlink launch and deployment of the first 60 satllites scheduled for May 15, 2019 says: With a flat-panel design featuring multiple high-throughput antennas ...
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Delta-V of Starlink Satellites

The recently launched Starlink satellites are designed to use their HAL Ion thrusters to seek their own independent orbits, evade collisions, and de-orbit at the end of their lives. That's a lot of ...
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What exactly are “launch tables” and “dog bones” in the context of SpaceX's Super heavy-lift launch vehicle?

@geoffc's Pod Bay comment and link Great aerial photo of launch table with the 'dog bones' being installed. So curious how this will all play out! https://twitter.com/RGVaerialphotos/status/...
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Did the Starlink precursor Tintin satellites ever talk to each other? If so, how? Did they demonstrate an optical communications link?

Tintin A and B are the first two exploratory and testing spacecraft for SpaceX's Starlink program. It looks like they are in very similar orbits in both space and time, and are probably that way so ...
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Would it be possible to alter the orbit of one satellite, with the exhaust plume of a rocket sufficient to deorbit it?

SpaceX plan to launch Starships towards Mars; many of them. This will involve burning hundreds to thousands of tonnes of propellant in low(ish) orbit, since each may require several refueling steps. ...
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1answer
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Reuse statistics of SpaceX Dragon capsules?

The question about the rolled-up and deployable solar array How does ROSA unroll? (Roll Out Solar Array) begins: The upcoming SpaceX launch with the apparently first re-use of a dragon capsule will ...
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Is there a record for unbroken series of “successful launches” by some objective criteria? Who has it now? What has to happen for it to change hands?

From the (I'd say) historic and pivotal hearing Wednesday, March 5, 2014 Defense Subcommittee (Chairman Durbin) Time and Location: 10:00 a.m., in Room SD-192 of the Dirksen Senate Office Building ...
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Are there Starlink train-finding websites?

In Astronomy SE Line of lights moving in a straight line, with a few following is the canonical close as duplicate target for questions about the likely seeing of recently deployed Starlinks that move ...
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Can we afford to increase rocket launches when we are are in desperate need to cut down emssions? [duplicate]

I love SpaceX and what they are doing with rockets and reusability, but their work is also going to exponentially increase the demand for new launches to orbit. If we are ever going to create a self ...
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Are Starlink satellites flaring?

The "Old and Busted" Iridium satellites flared like crazy because they had big flat metal surfaces for their phased array antennas (that were certainly so shiny completely by accident and ...
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What standard was used by NASA to certify the Dragon capsule controls as safe for crewed flight?

After watching the livestreams of Crew-1 and Crew-2 missions, I was curious about the certification the capsule had to go through, especially with the new control panels which seem to be largely ...
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What is the O/F mixture ratio and the ISP for the SuperDraco Engine by SpaceX?

Is it safe to assume a mixture ratio of 2.16 with an ISP of 313 s for the NTO/MMH, SuperDraco Engine manufactured by SpaceX? I am referencing the 2.16 propellant mixture ratio, and estimating or ...
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What happened to the SpaceX Starship SN11? Why did it crash?

What happened to the SpaceX Starship SN11? As per the live streams held on YouTube, I want to know what really happened to SpaceX Starship SN11 The live streams show a lot of smoke and others show ...
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What material on windows of space vehicles?

Submarine windows are designed to withstand extreme pressure differentials, and at least on private submarines, those are generally made of thick acrylic. I want to say space vehicles like Crew Dragon ...
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What was the cause of the fire on the SpaceX Starship SN15

SpaceX Starship SN15 had a successful test flight and touchdown but a few minutes after it landed, a small fire was seen to break out next to the Fins. Why did this break out? What was the cause of ...
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What was the thin, black object that was moving around the engine bay of SpaceX Starship SN15?

SpaceX Starship SN15 flew and landed successfully but, A few minutes into the flight, a long, thin seemingly black object was seen moving around the engine bay What was this object? What is it used ...
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Why does the signal get lost every single time a Falcon 9 booster or Falcon Heavy booster lands on a droneship? [duplicate]

SpaceX reuses the Falcon 9 boosters and they sometimes fly back from space and land on land or sometimes at sea. In the sea landings, they land the booster on a floating drone ship(mainly, Of Course, ...
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Why RP-1 and not Methane for Falcon 9's Merlin engines?

I've seen methane described as the best of both worlds---the worlds being hydrogen's energy density + pain-in-the-ass factor and RP-1's lower energy density + ... ease of use? And this has me ...
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What are these green text/line displays shown during the livestream of Crew Dragon's approach to dock with the ISS?

During the livestream of Crew Dragon's approach to docking, at 6:24 a laptop display is shown with lots of green text and a camera view of the International Space Station. What's going on?
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Dragon RCS: Four controlled degrees of freedom… or six?

Would Dragon's RCS clusters allow it to translate cleanly left-right and backward-forward, like a crab? Or are they meant only for roll/pitch/yaw control + longitudinal (up/down) translation, like an ...
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Does Mars One actually do anything?

I see SpaceX making a lot of technological advancements that will eventually lead to Mars settlement, such as development of affordable and reusable rockets. They're actually getting a lot of things ...
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Why do SpaceX Starships look so “homemade”?

Maybe this is not possible to answer, but I was hoping there was some reliable information available on this. It seems to me that the SpaceX Starship rockets have sort of a homemade quality to them, ...
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Crew Dragon: How thick is the skin?

Auto body panels are about 20-gauge, or just under 1 mm thick. This is fine for many reasons: thin panels are light for good fuel economy and crumple easily for shock absorption without unnecessary ...

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