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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.

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Why would NOAA restrict the ability of SpaceX to live stream the second stage?

I was watching the live stream of the Iridium-5 launch and they mentioned that NOAA had restricted their ability to live stream the second stage and that SpaceX was working to remove this restriction. ...
7
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1answer
395 views

What would be reasonable payload capacities of Falcon Super Heavy to various reference orbits

After the first Falcon Heavy launch, SpaceX CEO Elon Musk mentioned the feasibility of a Falcon Super Heavy, with 4 strap-on Falcon 9 boosters instead of 2. (https://www.theverge.com/2018/2/5/16975850/...
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Was SpaceX's launch of Formosat-5 more vertical than normal for any particular reason?

Reading both the abstract and the plain language summary of the recent paper published in the journal Space Weather Gigantic Circular Shock Acoustic Waves in the Ionosphere Triggered by the Launch of ...
3
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1answer
217 views

Status of SpaceX's Private Trip Around the Moon Mission

In a February 2017 press release titled "SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year" SpaceX announced We are excited to announce that SpaceX has been approached to ...
10
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1answer
298 views

What's happening in this photo?

This is a 30 second exposure of the Falcon 9 launch on March 6th. The trail is from right to left; the photo was taken north of the launch site, about 3 or 4 minutes into the flight. I think I ...
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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 ...
5
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1answer
368 views

Would it be possible for SpaceX's BFR to return the Hubble Space Telescope to Earth in the future? [closed]

Ever since the Space Shuttle retired, there was an unpopular decision to leave the Hubble Space Telescope until it eventually stopped working, since there was going to be no way to return it to Earth. ...
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1answer
138 views

how much does plasma proplusion cost as compare to conventional fuel in spacecraft? [closed]

I want to know how much does plasma propulsion cost as compare to other fuels in space crafts in the orbit
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1answer
647 views

How did SpaceX achieve such a high Thrust to Weight ratio with the Merlin engine?

Were there specific breakthroughs which allowed SpaceX to get such an incredible thrust to weight ratio? The next closest American engine was almost twice as heavy (199 vs 82), and the next closest ...
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4answers
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Why is SpaceX building the Big Falcon Ship before the Big Falcon Rocket?

I believe that SpaceX is planning on building the BFS (Big Falcon Spacecraft) before the BFR (Big Falcon Rocket), which serves as the first stage for the second-stage BFS. Does anyone know why they ...
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1answer
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Why does Merlin 1D Vac turbopump drive exhaust go around the nozzle?

In Merlin 1D Vac engine: the turbopump drive exhaust goes around the nozzle. Why is that so? The feature also seems to be missing in the first stage engine, as seen here: (screenshot taken from ...
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Is SpaceX doing any science with the Roadster and/or spacesuit?

I know that the putting the Tesla Roadster into orbit was primarily a publicity stunt. However, the thought occurred to me that it would also be an opportunity to do some science and/or gather data ...
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How might the experience of a trip to Mars differ in comfort and heath impact from a stint on the ISS?

A comment below the question How will they mitigate the effect microgravity in the BFR on manned trip to mars? suggests that the trip might be as short as 3 months, which is significantly shorter than ...
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1answer
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How will they mitigate the effect microgravity has in the BFR on manned trip to mars?

Very curious to know this, since it doesn't look like the BFR will utilize centrifugal force to emulate gravity as far as I know.
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1answer
281 views

Will Falcon Heavy center cores be block 5 or something else?

I've heard that Falcon Heavy will be using the new block 5 rockets for the two side boosters, but the center core has a different configuration than the side boosters. Is Elon planning on using ...
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1answer
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Can (or will) Block5 Falcon 9s be used on the Falcon Heavy?

With the Block5 version of Falcon 9 booster soon to be flying, will they be used for the Falcon Heavy, or will they remain a stand alone thing?
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1answer
351 views

Why is there a coasting phase between the second stage engine cutoff and payload deployment?

[basing this question on the Falcon 9, Paz satellite launch on 22 Feb] Hi, this is probably a silly question, but there is an approx 3 minute time difference between second stage engine cutoff and ...
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1answer
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What are the details of the SSTO Mars profile for the BFR?

In this link and on other occasions, SpaceX has indicated that the BFR would land on Mars, "top off the tanks" as the article says, and then launch back to Martian orbit. SSTO doesn't work on Earth ...
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1answer
216 views

Falcon-centaur or Falcon-ACES?

For very high delta-V missions (eg outer solar system) the Falcon family really starts to suffer from that fact that its second stage is still using RP-1/LO2 rather than LH2/LO2 with a consequently ...
5
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1answer
177 views

Why is Mr. Steven in California and not Florida

Mr. Steven is the ship that is used to catch fairings. There is one of these thus far, and it is based to assist Vandenberg, not Cape Canaveral. Why are they choosing to test the fairing catching in ...
7
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1answer
221 views

Falcon 9 fairings stability on reentry

On the descent of the fairings into the atmosphere how is stability provided? Why does it not start to rotate in a uncontrollable fall but reenter gently without apparently damage on the interior ...
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2answers
563 views

What is that thing spraying during a Falcon 9 launch? [duplicate]

What are those things spraying something at the pad during the beginning of a Falcon 9 launch?
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1answer
657 views

What sterilizations or other preparations or approval were necessary to send the Tesla Roadster into an orbit that may impact life-capable planets?

I understand NASA and other space agencies have rules in place to protect planets or moons that might harbor life. This includes requirements to sterilize spacecraft as well as avoid impacts. There ...
3
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1answer
258 views

How stable is an orbit of 335.9 km?

Spacex has recently begun deployment of its satellite constellation that will provide internet services. In their initial filings with the FCC they propose that they may have over 7,000 VLEO (very low ...
15
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1answer
390 views

What is this jet of material spraying out from Stage 2 during the SPACE-X PAZ mission?

This spray seemed to be there throughout the entirety of the Stage 2 burn but was especially visible once Stage 2 cutoff had happened. As that nozzle uses radiant cooling, it can't be cooling fluid, ...
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2answers
756 views

How do Falcon 9 fairings survive the reentry?

SpaceX recently tried to recover fairings from falcon 9, which landed intact in the ocean. How come these do not burn up during reentry?
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1answer
218 views

How did the Tesla roadster probe push away from earth's orbit? [closed]

I know every rocket/probe has to revolve around the Earth and then push out of the Earth's orbit to reach mars. So what exactly is kicking the rocket to push out of that orbit?
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2answers
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Is SpaceX trying to catch two pieces of fairing with one boat?

During the Paz / Starlink demo mission (2/22/18), SpaceX attempted to catch the fairing before it splashed-down into the ocean. They failed to catch it by just a few hundred meters. My question is:...
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1answer
98 views

Were MicrosatA-B represetative of final design for Starlink?

The reason I ask is that when you need to launch 4400 satellites packing them tightly to get as many on a launch as possible is a huge component. The possible numbers were discussed int this question:...
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0answers
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I got two questions about the Starman Tesla roadster orbiting the solar system [duplicate]

First, is it possible that the Starman Tesla roadster re-enters the earths orbit as it's close to the earth? Secondly, it's similar to the first one, is it possible that in 2020 when the Starman ...
3
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1answer
194 views

Which engine failed during CRS-1?

During SpaceX's CRS-1 mission, "engine 1" failed, but the booster still completed its primary mission due to a plentiful thrust and fuel margin. Clearly, an outboard engine failure is more critical ...
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3answers
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SpaceX merlin engine failure

On SpaceX's website, they make a claim that their rockets are the safest and most reliable in the industry. This is because apparently it can complete its mission even if up-to two of its engines fail ...
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1answer
256 views

Starman and Tesla temperatures [duplicate]

As The Tesla car and Starman continue to orbit the earth, How does the paint on the car survive the extremes of temperature? As I understand it, they are both exposed to temperatures between 120C and -...
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1answer
927 views

Why can't Falcon Heavy accelerate deep space payloads as fast as Atlas V and Delta Heavy?

A Falcon Heavy with an expendable core costs $95M and lifts 2.5x as much to GTO as the Atlas V. It's Pluto injection orbit payload is nearly half of the Atlas V's GTO payload. In the answer to this ...
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2answers
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What is the cause of this Falcon 9 first stage “dance” after landing?

Recently I watched a video on YouTube by Scott Manley: How To Do A Hoverslam - Things Kerbal Space Program Doesn't Teach. It deals about landing burns of Falcon 9 first stages. It features short clips ...
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3answers
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How many SpaceX Starlink Internet-service satellites could be deployed in a single Falcon 9 launch? Falcon Heavy? BFR?

The mass of the two test satellites being launched this month is 400 kg, but I don't believe that includes the antennae and the structure to hold and release them. Is total mass the only constraint or ...
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What planning tools and techniques are used to avoid collisions in space during launches?

What tools and techniques are used to calculate as well as to ensure a collision free trajectory when space junk as well as real live useful satellites are so numerous? While the chances of hitting a ...
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3answers
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Why didn't they launch the Falcon Heavy to be injected into Mars orbit?

With SpaceX's mission of getting a human colony, why would they launch the roadster into the astroid belt and not actually attempt to inject it into mars orbit?
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1answer
580 views

Why do we see smoke before ignition of Falcon Heavy? [duplicate]

We can see smoke at some regions before the main ignition takes place. Why is that?
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3answers
1k views

Where will SpaceX build and launch the BFR?

SpaceX are planning a new very heavy launch vehicle called BFR. Although the site of manufacture has not been finalised yet (as far as I know), everyone seems to assume it will be on the east coast. ...
7
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1answer
2k views

How much payload can Falcon Heavy Reusable lift?

I can only find figures for the Expendable configuration - 63.8 metric tons. The Wikipedia article says The partially reusable Falcon Heavy falls into the heavy-lift range of launch systems, ...
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1answer
151 views

What is pictured in the back of Falcon 9's 2015 launch photo?

Wikipedia (actually Wikimedia) has an image of Falcon 9's 2015 launch during its night flight (16th flight in total) that took place on Sunday, March 1, 2015 at 10:50pm ET: I was wondering what is ...
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2answers
4k views

Could SpaceX land on the moon today?

Now that SpaceX has a bunch of flown Block 4 Falcon 9 rockets laying around, could they theoretically do a mission to the Moon with landing even if it's just a rocket with no payload? Does it work out ...
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1answer
1k views

Will SpaceX attach its fairings to a booster to recover them?

Elon Musk has said that SpaceX is going to try to recover the fairings that protect the payloads on the upper stage. If SpaceX were to try and 'fly' the fairings back safely, they would have to add ...
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2answers
322 views

Frequency and modulation mode(s) for the SpaceX Tesla roadster mass in space

As an Electrical Engineer (emphasis in RF and radar, class of '74) who has followed the space program(s) since Mercury, and a prior flight test telemetry engineer, I was wondering if anyone knows what ...
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1answer
3k views

Why the soot pattern on the nosecone of Falcon Heavy side booster?

When a SpaceX booster is landed, we are used to seeing soot deposited all over it, usually in a specific pattern. You can read more about that in this question: Why the strange bands of soot of the ...
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3answers
9k views

Is a SpaceX launch completely automated?

Once the engines are ignited and liftoff occurs, are any operators/controllers on the ground making any manual changes to the flight? Or are they simply monitoring the entire event until the boosters ...
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2answers
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Would Elon Musk's roadster be able to rotate itself using its wheels as reaction control?

If so, couldn't it also rotate itself sideways somewhat by turning its front wheels? (assuming it has 4wd and electricity.)
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0answers
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Progress of the raptor engine

I have seen that Space X has tested a scaled down version of the raptor, but that was about a year ago. Does anyone know the current progress? Do they have a full scale model? Have they hot fired a ...
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2answers
14k views

Is Starman in the Tesla Roadster a real human?

I first need to know if starman is a real human or a robot. If he is a real human, how does he live? How many years can he live in that car?