Bay 12 Games Forum

Please login or register.

Login with username, password and session length
Advanced search  
Pages: 1 ... 194 195 [196] 197 198 ... 200

Author Topic: Space Thread  (Read 148391 times)

Sirus

  • Bay Watcher
  • Resident trucker/goddess/ex-president.
    • View Profile
Re: Space Thread
« Reply #2925 on: April 05, 2019, 03:58:59 pm »

Japanese declare war on SPAAAAACE!!!
I thought it was going to be a repeat of India's bright idea to launch a missile at a satellite in Earth orbit, destroying it and potentially threatening the ISS with debris.
Logged
Quote from: Max White
And lo! Sirus did drive his mighty party truck unto Vegas, and it was good.

Star Wars: Age of Rebellion OOC Thread

Shadow of the Demon Lord - OOC Thread - IC Thread

Starver

  • Bay Watcher
    • View Profile
Re: Space Thread
« Reply #2926 on: April 05, 2019, 06:14:47 pm »

First, we need to send George Clooney and/or Sandra Bullock up there for that.
Logged

Sirus

  • Bay Watcher
  • Resident trucker/goddess/ex-president.
    • View Profile
Re: Space Thread
« Reply #2927 on: April 05, 2019, 06:39:50 pm »

Logged
Quote from: Max White
And lo! Sirus did drive his mighty party truck unto Vegas, and it was good.

Star Wars: Age of Rebellion OOC Thread

Shadow of the Demon Lord - OOC Thread - IC Thread

Starver

  • Bay Watcher
    • View Profile
Re: Space Thread
« Reply #2928 on: April 05, 2019, 07:33:24 pm »

Because it's been done and probably won't help with our constellation of orbital debris one bit, but it hasn't done what it did to Clooney et al (it still could cause a cascade, but then so could any other random bit of debris that was already there).

What I find most worrying is, as seemingly revealed by the shuffling of participants in that spacewalk the other day, they might not be able to put everybody in a space-suit in an (slow-enough developing but inevitable) emergency. One sort of assumed they had kit enough for at least transfer between modules the wrong side of a breached central hub, should they find themselves needing to, without needing to do double-duty with some of them (undonning them and getting a still-suited colleague to take them back for the next wearer).

So maybe in such a slow-emergency they'd make do with slightly awkward sizings, and less fuss about the need for comfortably-fitting equipment for extended work, but emergencies don't tend to even be that slow (Russian-style microleaks aside) so you tend to imagine there'd be a set of good-enough-to-leap-into suits of at least the same number as the crew (but ideally a multiple of that, sets placed round the rig in whatever spare internal space they can cram them into).

Or maybe it's just not worth it given the number/proportion of scenarios where the emergency is basically so quick there's no chance at all of doing anything about it. Cost/benefit actuarial analysis doesn't justify the space and weight needed, so they only have two each of the US and Russian 'spacewalk' suits, and would rely on their individual limited-protection 'travel' suit for any very brief episodes of depressurised exposure protection (no real thermal maintenance or micrometeoroid-armouring)..

It's a corner I'm not comfortable to find being cut. But I'm not the one trained to take account of the risks.
Logged

Madman198237

  • Bay Watcher
    • View Profile
Re: Space Thread
« Reply #2929 on: April 05, 2019, 09:38:28 pm »

There is no "just jumping into it" in spacesuits. It literally takes hours to get suited up into one of those things.
Logged
We shall make the highest quality of quality quantities of soldiers with quantities of quality.

Starver

  • Bay Watcher
    • View Profile
Re: Space Thread
« Reply #2930 on: April 05, 2019, 10:06:09 pm »

Yes, when you're going to abandon your sort of Ok environment-inna-can for a planned period of swanning around in the somewhat less conducive expanses of space.

If/when your can clearly isn't going to do its job of delineating the two (and without a rather conspicuously busy Maxwellesque demon interfering, or a rogue Voyager probe returned with a heckova lot of assimilated capabilities, when things even out bestween the two it really won't do too much to improve the outside), there will be a plan of sorts, and even if it's not the First Immediate Action, some of the crew (depending upon precise circumstances and the options still open to to pursuit) may well be required to fast-track the suiting up process.

It is the fact that it rcannot be an option for everyone that I was commenting on, mainly.
Logged

Trekkin

  • Bay Watcher
    • View Profile
Re: Space Thread
« Reply #2931 on: April 05, 2019, 10:10:47 pm »

Or maybe it's just not worth it given the number/proportion of scenarios where the emergency is basically so quick there's no chance at all of doing anything about it. Cost/benefit actuarial analysis doesn't justify the space and weight needed, so they only have two each of the US and Russian 'spacewalk' suits, and would rely on their individual limited-protection 'travel' suit for any very brief episodes of depressurised exposure protection (no real thermal maintenance or micrometeoroid-armouring)..

A more optimistic version of that thinking is operational practice, yes. The ISS moves around any debris big enough to track and is designed to withstand micrometeoroid impacts, and for everything between there's always two Soyuz to serve as storm cellars or lifeboats, putting abnormally high debris concentration in broadly the same boat as other bad space weather. That leaves just random chunks of debris in a very specific size range as the only way for the station to lose pressure without the astronauts already able to leave, and that's a constant but very unlikely hazard.
Logged

Dorsidwarf

  • Bay Watcher
  • [INTERSTELLAR]
    • View Profile
Re: Space Thread
« Reply #2932 on: April 06, 2019, 12:28:17 am »

Yes, when you're going to abandon your sort of Ok environment-inna-can for a planned period of swanning around in the somewhat less conducive expanses of space.

If/when your can clearly isn't going to do its job of delineating the two (and without a rather conspicuously busy Maxwellesque demon interfering, or a rogue Voyager probe returned with a heckova lot of assimilated capabilities, when things even out bestween the two it really won't do too much to improve the outside), there will be a plan of sorts, and even if it's not the First Immediate Action, some of the crew (depending upon precise circumstances and the options still open to to pursuit) may well be required to fast-track the suiting up process.

It is the fact that it rcannot be an option for everyone that I was commenting on, mainly.

Putting a proper EVA suit on takes like a minimum of 15 minutes, with help from multiple people, on Earth, without the issues of microgravity or a trillion checks or the one-hour acclimatisation to the low pressure high oxygen atmosphere (which is the first thing you could skip in an emergency . It’s made of a whole bunch of smaller pieces, each of which is bulky as hell and you become increasingly restricted as you put more and more of it on.
Those interior flight suits which are vacuum rates but not space-rated probbably take less because they’re slim lined (but also not designed for leaving the vehicle at all) and are probbably what the crew put on in the case of a breach (Since I believe they’re stored in the Soyuz escape pods as they’re needed for re entry, and that’s where the crew go if there’s a problem with the main ISS
Logged
Quote from: Rodney Ootkins
Everything is going to be alright

Il Palazzo

  • Bay Watcher
  • And lo, the Dude did abide. And it was good.
    • View Profile
Re: Space Thread
« Reply #2933 on: April 10, 2019, 08:19:22 am »

First direct image of a black hole has just been released by the EHT team.
Logged

Starver

  • Bay Watcher
    • View Profile
Re: Space Thread
« Reply #2934 on: April 10, 2019, 08:35:14 am »

Spoiler (click to show/hide)

More seriously., and then this, amongst others.
Logged

Dorsidwarf

  • Bay Watcher
  • [INTERSTELLAR]
    • View Profile
Re: Space Thread
« Reply #2935 on: April 10, 2019, 10:54:19 am »

I'm still not entirely sure from media coverage whether this is a light-range picture or a radio telescope picture.
Logged
Quote from: Rodney Ootkins
Everything is going to be alright

Starver

  • Bay Watcher
    • View Profile
Re: Space Thread
« Reply #2936 on: April 10, 2019, 11:00:17 am »

"The Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through international collaboration — was designed to capture images of a black hole. (...)"

(For me, that site makes my browser go "Oh snap, something went wrong, click here to reload" after a few seconds, repeatedly, but I just persisted enough to copy the above and haven't tried to find out why. So maybe Caveat Browsor?)


Edit: Wikipedia summarises nicely (without crashing),
« Last Edit: April 10, 2019, 11:08:27 am by Starver »
Logged

JoshuaFH

  • Bay Watcher
    • View Profile
Re: Space Thread
« Reply #2937 on: April 10, 2019, 11:02:49 am »

It says it's the "Shadow" of a black hole, and not the black hole itself?
Logged

wierd

  • Bay Watcher
  • I like to eat small children.
    • View Profile
Re: Space Thread
« Reply #2938 on: April 10, 2019, 11:18:34 am »

An event horizon does not emit detectable levels of light. Instead, the extreme curvature of space that is the horizon, bends the brilliant glare of the accretion disk in a very tight and precise way, which produces a dark void to be observed. This dark void is the shadow of the horizon caused by the lack of paths for light to take around the horizon.
Logged

Starver

  • Bay Watcher
    • View Profile
Re: Space Thread
« Reply #2939 on: April 10, 2019, 11:23:27 am »

Depending on what you define as the black hole (with or without accretion disc, outside or inside the event horizon), it may not be possible to see the hole, by definition of what one is, but the shadow/silhouette or something similar is visible against its immediate hole-created surrounds.  Looking directly at the centre you'd see not much light from the matter yet to sufficiently fall inwards (and none from that which has) but as you view towards the sides you get an edge-on view of a wide swathe of that (actually, over the horizon, due to the gravitationally bent light-paths) so effectively you see "what it blots out", or its self-imposing shadow, of the especially 'glowing' material in its immediate vicinity.

Depends on how you want to describe it. It's a bit beyond everyday naked-eye observation, so it's not exactly an obvious thing to describe. "Shadow" sort of works, but maybe it's more akin to an Inferior Conjunction eclipse (the Moon blotting out the Sun) but... still not quite, because there's as much "sun" this side of the "moon" (and not even outshone!), yet the "moon" is the most significant party.

(Ninjaed by a more concise summary.)
Logged
Pages: 1 ... 194 195 [196] 197 198 ... 200