Recent comments in /f/space

OddClass134 t1_jaabdhx wrote

I dont hope to put anyone on blast, as it wasnt my presentation or my paper and I may be wrong.

I also think Im not being clear here when I say "theory" and considering the topic, I probably shouldnt throw that term around. I meant more the argument of looking at modifications of GR rather than for undiscovered particles. Which modification one supports is a different discussion.

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Gorrium t1_jaaaf7o wrote

Could you? yes, probably, but it would be so expensive and difficult it probably wouldn't be worth it.

First the ISS doesn't have a lot of living space, probably too cramped for a long mission. Second it has no radiation shielding, which would be big, heavy and expensive to retrofit. Third, it's old and you should probably repair and upgrade it before sending it to Mars. Fourth, it would need a new engine and massive fuel tank. Fifth, it doesn't have enough electricity production for deep space, so it would need more solar panels or a nuclear reactor. Sixth, its in the wrong orbit, it's or it was picked to make it easier for Russia and Japan to send payloads to it, it's very inclined. (I think, I'm not so great at orbital mechanics.)

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Pigs_in_the_Porridge t1_jaa86y8 wrote

You are very ill informed, eg. ignorant.

Do you know what a guidestar is? Do you know about adaptive optics?

Exoplanet hunting is very much done on the ground.

The black hole at the center of the Milky Way was discovered using telescopes in Hawaii. Won a Nobel Prize a few years ago.

And many many other recent discoveries.

SpaceX shills push this line and it is very much demonstrably false. Thousands of astronomers rely on ground based optical astronomy for their careers and they are extremely POed that a private company can ruin their work for profit.

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zeeblecroid t1_jaa36hv wrote

Pretty much. It's a black hole into which VC dollars fall and no useful product will escape, at least with any of the startups claiming to be working on the problem. They're always talking about direct physical rendezvous with some gimmicky method of capturing one single piece of debris, which isn't ever going to so much as dent the problem.

It's laser brooms or nothing, and none of the startups are looking in that direction - again, because none of them have any real intention of following through anyway.

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Decronym t1_jaa33m1 wrote

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

|Fewer Letters|More Letters| |-------|---------|---| |IM|Initial Mass deliverable to a given orbit, without accounting for fuel| |LEO|Low Earth Orbit (180-2000km)| | |Law Enforcement Officer (most often mentioned during transport operations)| |RTG|Radioisotope Thermoelectric Generator| |VLEO|V-band constellation in LEO| | |Very Low Earth Orbit|

|Jargon|Definition| |-------|---------|---| |Starlink|SpaceX's world-wide satellite broadband constellation|


^(5 acronyms in this thread; )^(the most compressed thread commented on today)^( has 17 acronyms.)
^([Thread #8628 for this sub, first seen 27th Feb 2023, 23:10]) ^[FAQ] ^([Full list]) ^[Contact] ^([Source code])

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CardboardSoyuz t1_jaa2by2 wrote

I agree Callisto has promise but the delta-V to get to the surface of Callisto from LEO is like 28 kps, and the delta V to get to the surface of Mars is about 10 kps and Callisto is no help with the aerobraking.

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majorbraindamage t1_jaa29hb wrote

Probably not a good idea. It's old and has been stressed under pressure and the electronics exposed to cosmic rays for a long time. A mission to Mars should be a mission specific craft that is fresh and likely to not break down millions of miles from home with no help available. A manned mission to Mars has to go right the first time, or risk losing public support.

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