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Congress warned that NASA’s current plan for Artemis “cannot work” - Ars Technica (arstechnica.com)
submitted 11 months ago by to c/space@mander.xyz
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In recent months, it has begun dawning on US lawmakers that, absent significant intervention, China will land humans on the Moon before the United States can return there with the Artemis Program.

So far, legislators have yet to take meaningful action on this—a $10 billion infusion into NASA’s budget this summer essentially provided zero funding for efforts needed to land humans on the Moon this decade. But now a subcommittee of the House Committee on Space, Science, and Technology has begun reviewing the space agency’s policy, expressing concerns about Chinese competition in civil spaceflight.

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[–] 0 points 11 months ago (6 children)

Saying it “cannot work” because of orbital refuelling seems pretty disconnect from reality

how much orbital refueling experience do you have? none.

lol, how much does ANYONE have? NONE.

but you're gonna trust felon musky when he says they'll figure it out quickly, safely, and on budget?

the ISS has NOT been refueled. Ever. It's been boosted. Normally this is done with docked Soyuz capsules, now it can also be done with docked crew dragon.

we're in the early days of all this. https://www.nasa.gov/nexis/robotic-refueling-mission-3/

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  • [–] 1 point 11 months ago (5 children)

    Zvezda can be refuelled by visiting Progress vehicles and used to boost the ISS.

    Similarly, the Chinese Tianzhou can transfer propellant to Tiangong.

    The Chinese Shijian satellites have also done refuelling.

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  • [–] 1 point 11 months ago (4 children)

    citation requested on any of these claims.

    you're claiming that zvezda, which uses UDMH for fuel, has been refueled in orbit. UDMH, a hypergolic rocket fuel.

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  • [–] 1 point 11 months ago (3 children)
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  • [–] 1 point 11 months ago (2 children)

    https://en.wikipedia.org/wiki/Progress_(spacecraft)#Design

    https://en.wikipedia.org/wiki/Zvezda_(ISS_module)#Design

    you realize there's a difference between maneuver thrusters and boosters right? they use the soyuz and crew dragons to boost. they use the hypergolics to maneuver.

    https://www.china-in-space.com/p/tianzhou-9-resupply-mission-blasts

    "Propellants to refuel Tiangong’s maneuvering and attitude control thrusters are set to be delivered too" this is not boost, this is maneuver.

    https://spacenews.com/chinas-shijian-spacecraft-separate-after-pioneering-geosynchronous-orbit-refueling-tests/

    this just happened two weeks ago, and if you read the article:

    "The separation could mark a successful conclusion to a world-first refueling operation in GEO. However, neither China’s space authorities nor the satellites’ manufacturer have commented on the mission since the launch of Shijian-25 in January."

    that COULD is doing heavy lifting, why hasn't the news come out from official sources?

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  • [–] 1 point 11 months ago (1 child)

    Ah, so they are refuelling Zvezda and Tiangong, but it doesn't count. I acknowledge that they aren't transferring cryo fuels. I just said they're regularly transferring prop.

    Zvezda can orbit raise, btw.

    https://www.russianspaceweb.com/iss_sm.html

    two orbit-correction engines, KD, designated S5.79 with a thrust of 300 kilograms each and 32 small thrusters, DMT, designated 11D428A-10 and 11D428-14. They were developed at NIIMash and had a thrust of 12.5 kilograms each and designed to control the course, yaw and bank

    Refuelling Tiangong's xenon hall effect thrusters probably doesn't count, so I guess I'll ignore it.

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  • [–] 1 point 11 months ago

    I acknowledge that they aren’t transferring cryo fuels.

    alright.

    it's gonna be a neat trick to watch two spacecraft line up and xfer lox or liquid methane. one part of me wonders if they'll try to erect a sunshade or limit it to night portions of the orbit because trying to figure out the big problem - pumping cryogenic liquids in that env is hard enough without gigantic temp swings on the exteriors and tubes/piping....

    I do not think it'll work the first time lol

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