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Old 06-01-2014, 09:40 AM  
DaFace DaFace is offline
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Space Exploration megathread
Since a number of cool things are happening in space exploration these days, we'll widen the scope of this thread a smidge. Conversation about all things space exploration are welcome, whether it be from NASA, SpaceX, ULA, Blue Origin, or anyone else. Chances are most of the discussion will still be about SpaceX since they love to make things public and fun, but nothing's off limits. I'll eventually get around to modifying the OP to include resources for other companies too, but in the meantime, feel free to post any cool stuff you run across.

Lists of Upcoming Missions



How to Watch a Live Launch


Where to Learn More
Spoiler!


Glossary
Spoiler!
Last edited by DaFace; 12-10-2020 at 03:36 PM..
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Old 08-02-2021, 11:49 AM   #4411
Donger Donger is offline
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Looks like about six (?) Raptors on BN3?
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Old 08-02-2021, 11:51 AM   #4412
unlurking unlurking is offline
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Looks like about six (?) Raptors on BN3?
29 and BN4, and cool, they painted the gridfins!
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Old 08-02-2021, 11:52 AM   #4413
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While Starship is obviously the most exciting thing going on right now, ULA/Boeing are finally going to try again for their ISS-bound test tomorrow. Fingers crossed nothing else goes wrong.
Personally I hope SH and SS are stacked on the OLT before the Starliner launch. Nice backdrop to put ULA/BOEING/SLA into perspective while they're getting press coverage. At the same time, I hope the Starliner mission is a huge success.
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Old 08-02-2021, 11:53 AM   #4414
Donger Donger is offline
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29, and cool, they painted the gridfins!
Oh wow:
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Old 08-02-2021, 11:55 AM   #4415
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Oh wow:
I am so excited just to see a test fire, let alone an actual launch!!!
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Old 08-02-2021, 11:56 AM   #4416
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I take it that not all of the Raptors are going to gimbal?
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Old 08-02-2021, 11:58 AM   #4417
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I take it that not all of the Raptors are going to gimbal?
Correct. I believe the outer ring are all fixed, and the inner engines are the one doing the gimbaling.
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Old 08-02-2021, 11:59 AM   #4418
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Correct. I believe the outer ring are all fixed, and the inner engines are the one doing the gimbaling.
Yep, just found this:
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Old 08-02-2021, 12:01 PM   #4419
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They recently celebrated the 100th roll-off of a completed Raptor engine, and also eliminated the gimbal / non-gimbal variants. They'll be churning these things out insanely fast I imagine. Well, insanely fast for a rocket engine.

Hey Jeff, wen BE-4? :P


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Old 08-02-2021, 12:01 PM   #4420
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I take it that not all of the Raptors are going to gimbal?
Last I heard (Musk tweet), the inner 13 gimbal and the outer 20 do not.
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Old 08-02-2021, 12:54 PM   #4421
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So a question for those who know more about this:

Mars has almost no atmosphere and an explosive decompression is always a moment away? How do you colonize that kind of environment? One defect or stress can result in everyone dying pretty quickly, no?
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Old 08-02-2021, 12:58 PM   #4422
Donger Donger is offline
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Originally Posted by RINGLEADER View Post
So a question for those who know more about this:

Mars has almost no atmosphere and an explosive decompression is always a moment away? How do you colonize that kind of environment? One defect or stress can result in everyone dying pretty quickly, no?
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Old 08-02-2021, 01:04 PM   #4423
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So a question for those who know more about this:

Mars has almost no atmosphere and an explosive decompression is always a moment away? How do you colonize that kind of environment? One defect or stress can result in everyone dying pretty quickly, no?


In all seriousness, I think they've had a LOT of experience with ISS and "explosive" decompression is mostly a movie thing. IIRC, the ISS is currently losing 1lb a day of atmosphere through leaks. A recent Soyouz was found to have a hole rooted in a manufacturing mistake. The spacecraft survived launch and docking with the hole. Leaking atmosphere is just life in space.


EDIT: References...
https://www.nasaspaceflight.com/2018...airs-continue/

Couldn't find the 1lb per day loss I mentioned, but assuming my Duck-Fu is just not strong today, but there has been a known leak for a year...
"The air leak in the Zvezda module, which provides living quarters for crew members and life support systems, was detected last year. It poses no danger to the crew but persists despite attempts to fix it by sealing cracks."
https://www.reuters.com/world/europe...le-2021-07-31/
Last edited by unlurking; 08-02-2021 at 01:12 PM..
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Old 08-02-2021, 01:05 PM   #4424
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But yes, people would have to live in pressurized environments. The pressure on Mars is something like .09 PSI and on Earth it's 14.7 PSI. Quite a delta P although I'd imagine that we wouldn't pressurize at 14.7 on Mars.

And, after a while, there would be a large volume of air in that environment, so there'd be some time before the Martians would be sucking Mars' atmosphere.
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Old 08-02-2021, 01:46 PM   #4425
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TPS install is also moving quickly, although it looks like they've been having issues with the curves on the nosecone section...




https://www.youtube.com/watch?v=mhJRzQsLZGg
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