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New Horizons is getting ready for its arrival at Pluto next year - http://www.nbcnews.com/science/space/its-alive-nasas-new-horizons-pluto-probe-wakes-work-n262996

It's scary when it's saying it's taking ~4 hrs to send the signal back to Earth at the speed of light from that distance whilst we're told that there are known star systems 13 billion light years away. :o

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They're talking about 2030 but they've got a lot of problems to solve before doing it, cosmic radiation killing the crew for one. If you've any ideas send them here*, could be some money in it. I don't see them sending people into deep space for a long time, intelligent robots will become more efficient and they're a lot easier to look after in hostile environments. There won't be any scientific advantage in sending people, and it's an awful lot more expensive and technically challenging. Who wants to live on Mars anyway, it's a dump, makes Livingstone look full of character. I won't be volunteering until they build generational ships, where they can put you to sleep and wake up by an earthlike planet on the other side of the galaxy.

*https://www.innocentive.com/ar/challenge/9933637

Who wants to live on Mars? I fucking do. I'd much rather live on Mars with a few other folk than here.

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Who wants to live on Mars? I fucking do. I'd much rather live on Mars with a few other folk than here.

You could try it out by staying in a caravan parked in an abandoned quarry for a bit, and wearing full diving kit when you go outside.

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  • 2 weeks later...

I may have asked this before but think it was on another thread and can't remember the answer.

If some big asteroid or such like was suddenly discovered to be hurtling straight towards earth and was gonna hit us straight on (i.e its just big enough thing to wipe out earth) then I have a few questions:

1. How much notice would the top dogs at NASA get? i.e a month, weeks, days etc?

2. Would they keep it hush hush?

3. Is there anyway to prevent it hitting i.e altering it's course/blowing it up etc

4. Is there currently some sort of emergency protocol for this to preserve human life?

5. If yes to above, what would this likely be? Do they have a big rocket on standby that they would fill with intelligent folk and get them the fcuk out of there?

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My favourite method of saving the Earth from a massive asteroid is to send up two enormous cans of spray paint and spray one side black, the other white. The sunlight being absorbed on the black side and reflecting off the white side would be enough to divert it off course. You'd have to spot it years if not decades before impact though.

1. How much notice would the top dogs at NASA get? i.e a month, weeks, days etc? They'd need years at least, which they would likely get for a really big one.

2. Would they keep it hush hush? Maybe

3. Is there anyway to prevent it hitting i.e altering it's course/blowing it up etc Not at present as far as I know

4. Is there currently some sort of emergency protocol for this to preserve human life? Probably a few bunkers for top politicos and military.

5. If yes to above, what would this likely be? Do they have a big rocket on standby that they would fill with intelligent folk and get them the fcuk out of there? The best they could do would send off some genetic blueprints, maybe some seeds and frozen samples, and a digital record of the Earth's history, and a copy of A Hitchhiker's Guide to the Galaxy. A nice final joke from humanity would be to pretend it was our Bible.

Edited by welshbairn
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I may have asked this before but think it was on another thread and can't remember the answer.

If some big asteroid or such like was suddenly discovered to be hurtling straight towards earth and was gonna hit us straight on (i.e its just big enough thing to wipe out earth) then I have a few questions:

1. How much notice would the top dogs at NASA get? i.e a month, weeks, days etc?

2. Would they keep it hush hush?

3. Is there anyway to prevent it hitting i.e altering it's course/blowing it up etc

4. Is there currently some sort of emergency protocol for this to preserve human life?

5. If yes to above, what would this likely be? Do they have a big rocket on standby that they would fill with intelligent folk and get them the fcuk out of there?

Survival would depend on the size of the asteroid.

All life on Earth could pretty easily be wiped out and there would be f**k all we could do about it

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What if something blew up the moon but missed Earth completely. I assume we can survive without it?

Nah we would be fucked without the moon as it helps keep a stable orbit.

Also, I would imagine the debris from the moon "exploding" would also kill us

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The surfing community would be a bit miffed. And we'd probably all die from the effects on the climate from a changed orbit. Not sure if women would be insane all the time or not at all.

Edited by welshbairn
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If you want to avoid the harmful effects of being in outer space without a suit:

Humans: don't hold your breath for thirty seconds, after that you're dead anyway but you might be rescued before.

Chimpanzees: run like fcuk and hide, now! If caught,make out you're really thick and unfit.

How would the unprotected human body react to the vacuum of outer space? (Submitted June 03, 1997)

The Question
How would the unprotected human body react to the vacuum of outer space? Would it inflate to bursting? or would it not? or would just the interior gases hyperinflate? We are also relating this to short-term exposure only. This question primarily relates to the pressure differential problems. Temperature or radiation considerations would be interesting as well.
The question arose out of a discussion of the movie 2001. When Dave "blew" himself into the airlock from the pod without a helmet, should he have "blown up" or is there "no difference" as shown in the movie correct?
The Answer
How long can a human live unprotected in space?
If you don't try to hold your breath, exposure to space for half a minute or so is unlikely to produce permanent injury. Holding your breath is likely to damage your lungs, something scuba divers have to watch out for when ascending, and you'll have eardrum trouble if your Eustachian tubes are badly plugged up, but theory predicts -- and animal experiments confirm -- that otherwise, exposure to vacuum causes no immediate injury. You do not explode. Your blood does not boil. You do not freeze. You do not instantly lose consciousness.
Various minor problems (sunburn, possibly "the bends", certainly some [mild, reversible, painless] swelling of skin and underlying tissue) start after ten seconds or so. At some point you lose consciousness from lack of oxygen. Injuries accumulate. After perhaps one or two minutes, you're dying. The limits are not really known.
You do not explode and your blood does not boil because of the containing effect of your skin and circulatory system. You do not instantly freeze because, although the space environment is typically very cold, heat does not transfer away from a body quickly. Loss of consciousness occurs only after the body has depleted the supply of oxygen in the blood. If your skin is exposed to direct sunlight without any protection from its intense ultraviolet radiation, you can get a very bad sunburn.
At NASA's Manned Spacecraft Center (now renamed Johnson Space Center) we had a test subject accidentally exposed to a near vacuum (less than 1 psi) in an incident involving a leaking space suit in a vacuum chamber back in '65. He remained conscious for about 14 seconds, which is about the time it takes for O2 deprived blood to go from the lungs to the brain. The suit probably did not reach a hard vacuum, and we began repressurizing the chamber within 15 seconds. The subject regained consciousness at around 15,000 feet equivalent altitude. The subject later reported that he could feel and hear the air leaking out, and his last conscious memory was of the water on his tongue beginning to boil.
Aviation Week and Space Technology (02/13/95) printed a letter by Leonard Gordon which reported another vacuum-packed anecdote:
"The experiment of exposing an unpressurized hand to near vacuum for a significant time while the pilot went about his business occurred in real life on Aug. 16, 1960. Joe Kittinger, during his ascent to 102,800 ft (19.5 miles) in an open gondola, lost pressurization of his right hand. He decided to continue the mission, and the hand became painful and useless as you would expect. However, once back to lower altitudes following his record-breaking parachute jump, the hand returned to normal."
References:
Frequently Asked Questions on sci.space.*/sci.astro
The Effect on the Chimpanzee of Rapid Decompression to a Near Vacuum, Alfred G. Koestler ed., NASA CR-329 (Nov 1965).
Experimental Animal Decompression to a Near Vacuum Environment, R.W. Bancroft, J.E. Dunn, eds, Report SAM-TR-65-48 (June 1965), USAF School of Aerospace Medicine, Brooks AFB, Texas.
Survival Under Near-Vacuum Conditions in the article "Barometric Pressure," by C.E. Billings, Chapter 1 of Bioastronautics Data Book, Second edition, NASA SP-3006, edited by James F. Parker Jr. and Vita R. West, 1973.
Personal communication, James Skipper, NASA/JSC Crew Systems Division, December 14, 1994.

http://imagine.gsfc.nasa.gov/ask_astro/space_travel.html

Edited by welshbairn
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