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This is thermodynamically equivalent to running a freezer with the door open, due to the second law of thermodynamics it will just generate more heat than doing nothing would
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Maybe on a gas giant or other H2 atmosphere you could bring along oxidizer and source your fuel from the atmosphere, like the inverse of what is done on earth
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8 hours ago, Nuke said:
you can see the whole thing from the city cam video. power failures, the clearing of the bridge (in the minutes before traffic was light but consistent). i bet they called it in when they first lost power, i cant imagine 911 dispatch being that fast in baltimore. wonder why the word wasn't passed to the construction crew. judging by the length of the ramps it was likely out of bullhorn range and the crew was probably operating loud machinery wearing hearing protection and not listening to the radio.
Dispatch audio was released, they said that they were blocking traffic with two cars, working on getting a car to get the crew off the bridge when the ship hits
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14 minutes ago, tater said:
Dunno about those sorts of bumper designs, but you'd think with a sharp point, the bow would then glance off—and the barrier can be at some distance. Have such barriers been built at any other port?
There are stone barriers blocking the towers for the Veranzo narrows bridge in New York
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There's this which claims to be a fusion augmented electric plasma thruster
https://interestingengineering.com/space/nuclear-fusion-powered-electric-propulsion-drive
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No, most of the forces from a bullet are shear or compressive, not tensile.
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Here's a link, they got a signal but since it's lunar noon it's too hot to consistently operate so they told it to wait until it cools down
https://www.iflscience.com/its-alive-japans-moon-lander-has-survived-its-first-lunar-night-73121
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sounds like they got a return signal, maybe it isnt as bad as it looked
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Sounds like they dont know where or if it landed, doesnt sound good
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Mimas has a geologicaly young ocean beneath its surface
https://phys.org/news/2024-02-mimas-tiny-moon-young-ocean.html
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2 hours ago, Minmus Taster said:
The telemetry from the stream made it seem like all the thrusters were in a ring on the bottom facing down so it would be hard to tip it with those
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seems like water on mars is more widespread than previously thought, with large amounts of water ice on the equator
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Latest update shows a picture from the spacecraft, distortion to the MLI is visible
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Huh, wonder if this will be the irl version of the mun lander that gets stuck as an orbiter due to using too much delta V
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Looks like we missed this one, there was an all solid stage launch from jeju. Not many details available that I can find.
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Looks like there was an explosion during a test fire at Jiuquan
https://spacenews.com/satellite-imagery-reveals-explosion-at-chinas-jiuquan-spaceport/
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SpaceX got another X-37b launch, this time on falcon heavy, wonder why they are using it instead of regular falcon
https://spacenews.com/u-s-air-force-x-37b-spaceplane-to-launch-on-a-spacex-falcon-heavy-rocket/
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Lucy has flown by Dinkinesh, NASA has received communications from the spacecraft, but I cant find any pictures yet, probably gonna take a while for them to download with the light lag
https://blogs.nasa.gov/lucy/2023/11/01/nasas-lucy-spacecraft-completes-asteroid-flyby/
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20 hours ago, SunlitZelkova said:
It’s Rogozin, so you never know, but I am inclined to think this is either fake or AI generated.
It’s too dumb even for Rogozin. Modern Soyuz vehicles are not equipped with guidance systems like a ballistic missile, and cruise missiles and SRBMs are already being used anyways.
Yeah the only way I actually see this being a practical idea is if the new reentry vehicle they cobble together on top of a platform wholly unsuitable for ICBM work is somehow more reliable than whatever ballistic missiles they have lying around, maybe if the private in charge of maintenance decides to get into the scrap copper business, though I don't think a Soyuz would fare much better against that
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Sounds like the Soyuz may be returning to it's ICBM roots soon, not sure that this is going to work too well without a new reentry vehicle, and even then this won't be that accurate
https://www.newsweek.com/putin-roscosmos-bild-rogozin-rocket-soyuz-1837809
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20 hours ago, tater said:
Large solar panels. Could stick an RTG and a high-gain to it I suppose. Dunno what the dv of it is. Doesn't need much to slingshot out of the solar system.
yeah maybe, but I don't think there are many missions worth using an RTG on where you would use a cheap ESPA ring bus instead of a custom design, not to mention the thermal control, micrometeoroids, radiation hardening, and the rather scarce nature of ground stations that can reach that far
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They said that this thing can go interplanetary, and even interstellar in the aviation week article. Think that might be overpromising a bit much?
geoengineering with sterling engines
in Science & Spaceflight
Posted
He said he wanted to heat the atmosphere and use that to cool the ground, going off the spacecraft analogy, this would be like putting the radiator inside of the spacecraft.