'Death Star' Aimed at Earth 400
An anonymous reader writes "A spectacular, rotating binary star system is a ticking time bomb, ready to throw out a searing beam of high-energy gamma rays that could lead to a major extinction event — and Earth may be right in the line of fire. Australian science magazine Cosmos Magazine reports: 'Though the risk may be remote, there is evidence that gamma ray bursts have swept over the planet at various points in Earth's history with a devastating effect on life. A 2005 study showed that a gamma-ray burst originating within 6,500 light years of Earth could be enough to strip away the ozone layer and cause a mass extinction. Researchers led by Adrian Melott at the University of Kansas in Lawrence, U.S., suggest that such an event may have been responsible for a mass extinction 443 million years ago, in the late Ordovician period, which wiped out 60 per cent of life and cooled the planet.'"
lies, Lies, LIES!!! (Score:5, Funny)
443 million years ago
How do these fancy-pants "scientists" know what happened 442,994,000 years before Earth was created?
Re:lies, Lies, LIES!!! (Score:5, Funny)
Re:lies, Lies, LIES!!! (Score:5, Funny)
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Re:lies, Lies, LIES!!! (Score:4, Funny)
Re:I asked GOD (Score:5, Funny)
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Whip out your concordance. The Hebrew word for "day" used in Genesis isn't meant to be metaphorical; it's a literal, 24-hour period of time.
If you assume that everything in the Bible is no deeper than a convoluted historical document, you're missing a lot.
Re:I asked GOD (Score:4, Informative)
The problem (Score:3)
The problem with those embracing the Bible is that most of them have never read it either. It is an amalgam of different stories that contradict each other. Any serious theologian that has studied the Bible does not believe in the literalness of the text. Anyone with a modicum of intelligence that does the same will immediately see the contradictory and ridiculous nature of it. So we are
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If you believe that everything contradicting a literal interpretation of the Bible is a lie, you're missing even more.
That's exactly the point I was trying to make. They're creation stories, not docu-dramas. Ask, "what insight is the author of this text trying to convey?" not "How can I rationalize a story to fit a literal history I want to believe in."
Re:I asked GOD (Score:5, Funny)
A man has gained an audience with God.
Man: Oh Lord, what is a million years like to you?
God: To me, my son, a million years is but a day.
Man: Oh Lord, what is a million dollars like to you?
God: To me, my son, a million dollars is but a penny.
Man: Oh Lord, would you give me a penny?
God: Tomorrow.
Back on this death star thing (Score:3, Funny)
Thanks guys (Score:5, Informative)
Re:Thanks guys (Score:5, Funny)
Re:Thanks guys (Score:5, Funny)
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Sounds like one of those three steps to profit schemes...
Re:Thanks guys (Score:5, Insightful)
Re:Thanks guys (Score:5, Informative)
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Gamma rays don't suddenly stop dead in their tracks at 6500 light years, nor do they dissipate that fast. Gamma rays are light and the fact that we can see this star (and those thousands of times further away) indicates that if a large burst of gammas was flung in our direction we'd be well in the path. There was a recent episode of The Universe that covered this possibility. Nothing we can do about
I wouldn't worry overmuch (Score:5, Informative)
Re:Thanks guys (Score:4, Insightful)
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Uh, no, we can not see events 4000 light light years away instantaneously. We would have to wait 4,000 years before the image of that Gamma Ray Disturbance reached Earth. At which tim
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Re:Thanks guys (Score:5, Informative)
The only thing we can do is rely on predictions based on our existing knowledge of physics that a light-speed event will soon begin, or continue. But we will never be able to know for certain that it's happened until it's upon us. By analogy, we know the sun will continue shining its light at us because we know that even in the worst case scenario, a collapse of its internal fusion reactions would take millions of years and we could see signs that such an event was happening, such as seeing that its hydrogen fuel supplies were about to run out. However, if there is some previously unknown method of collapse that is instantaneous and the sun looked entirely normal until it happened, then it would be entirely possible that the sun has already shut down and in 1 to 8 minutes we are about to realize that today is definitely not a good day.
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You don't know that. Some of the posters might have been relatively further away and it just took the message longer to get to you, but they might have posted at earlier.
Or, maybe that's the point...
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Funny that all three posts say exactly the same thing... You guys must've posted at exactly the same time!
Only from your frame of reference.
Re:With the risk of sounding stupid... (Score:4, Insightful)
Yep.
However, we might be able to spot changes in a star leading up to the actual burst. If we knew what to look for.
Re:Not so (Score:5, Funny)
See, problem solved.
Re:Thanks guys (Score:4, Interesting)
Which leads us to the interesting question: If we knew we were in danger and had 100,000 years to do something about it, what would be the simplest solution?
1) Move everybody somewhere else
2) Put up shields
3) Move the Solar system out of the way
4) Point the Supernova at the Arcturans instead
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Thanks Global Warming (Score:3, Funny)
If not, can't we just count on that layer of lead-based space debris to block the gamma rays? No? well then, feets don't fail me now!
Re:Thanks Global Warming (Score:5, Funny)
Except for the searing ultraviolet from a lack of ozone, I would say you are about spot on.
Re:Thanks Global Warming (Score:4, Funny)
Re:Thanks Global Warming (Score:5, Insightful)
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Re:Wouldn't killing 60% of life result in lots of (Score:3, Funny)
Atmosphere? What atmosphere? (Score:4, Interesting)
Re:Atmosphere? What atmosphere? (Score:5, Informative)
The average period between pole flips is about 250,000 years, so that will give you a pretty good idea of how often it happens, and how unlikely it is that atmospheric loss follows. For the curious, it's been about 800,000 years since the last flip, so we're due one.
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What it really lacks is a dense atmosphere...It's only about 1/100th as dense as ours. It would be interesting if it were a little denser, because the atmosphere is almost completely CO2. In composition, it is much heavier than our primarily nitrogen atmosphere, and it does lend weight to the idea that the bulk of the "light" elements in the atmosphere have been stripped
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Oh come on! (Score:5, Funny)
Ob. Simpsons Quote (Score:5, Funny)
Bart: Aw, recycling's useless, Lis. Once the Sun burns out, this planet is doomed. You're just making sure we spend our last days using inferior products.
~Philly
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Episode of Sliders (Score:2, Informative)
Good show, had some hot geeky chicks on it for awhile.
Re:Episode of Sliders (Score:5, Insightful)
That show started off great and is 100% responsible for me getting interested in the alternate-history genre. Unfortunately, after the creator left they just resorted to stealing movie plots and it got downright ridiculous and pathetic.
~Philly
Don't tase me, bro ... (Score:4, Funny)
Well guys.. (Score:5, Funny)
Re:Well guys.. (Score:5, Funny)
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It's OK! Barack Obama will know what to do! If this thing can just... hold... off... until... next... year.
Maybe if we just planned an unconditional sit-down with the people running that star, they'd like us again.
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I suppose it's possible you haven't seen the fine documentary, Mars Attacks. Well you should, mister.
lead paint (Score:4, Funny)
Not my problem (Score:5, Insightful)
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No problem (Score:5, Funny)
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Wait! What do you mean stars are basically just big long continuous nuclear reactions and nuking it only makes it worse?!
I agree with that guy earlier... we're doomed.
Re:No problem (Score:5, Funny)
I've also trained the gunners as to what the rebel ships look like and what the empire ships look like together with electro therapy they now know what to shoot at.
The major commander on the death star will not be on board one of the fighters defending it.
And anyway when the heroes first arrive on the station they will be taken, under armed guard, placed against the nearest wall and shot. Following being shot they will have their heads chopped off while I watch giving no chance for them to stage a stunning escape and disrupt my evil plans. This death will lack drama will be simple, won't go wrong, will make a mess - but hey, I've got an army of evil underlings who can clean up.
Re:No problem (Score:5, Funny)
No problem, we'll just use a frozen chicken.
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(Looking up and retching) (Score:3, Funny)
Please God, no... (Score:5, Funny)
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From TFA (Score:2, Funny)
Yeah, I'm really gonna worry about this (Score:2)
Nitwits.
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heh... (Score:2)
Impossible (Score:5, Funny)
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Hmm let's think about this a sec... (Score:2)
And we are looking back 8000 years from today, since light took us 8,000 years to get to us. It will take another 8,000 years for a gamma blast to get to us. Something tells me were out of harms way.
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My god, man, think of the children! Someone please think of the children!
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Cosmos Magazine reports (Score:5, Funny)
Other articles include:
10 Fabulous Handbags for the Apocalypse
Is Your Man Cheating? Find Out With A Quantum Telescope.
Lose Weight Fast - New Dark Matter Diet.
Re:Cosmos Magazine reports (Score:4, Funny)
Mass Extinction (Score:3, Funny)
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Gamma Ray bursts in fiction (Score:2)
One of the best hard-science Sci-Fi books I've ever read.
Isn't it obvious? (Score:5, Funny)
Not to nitpick (Score:2)
"Paging Dr. Banner" (Score:4, Funny)
If this happens, don't make anyone angry. You wouldn't like them when they're angry.
--JoeSince the gamma rays move at the speed of light.. (Score:2)
Re:Since the gamma rays move at the speed of light (Score:4, Funny)
Whew, thank goodness (Score:2)
The Bad Astronomer has covered this on his blog. (Score:5, Informative)
That's no moon... (Score:2, Funny)
Earth cooked, news at 11... (Score:5, Informative)
If a GRB hits us in the next 10 years, the Earth is cooked and we're screwed. Game over.
If a GRB hits us in the next 100 years, the Earth is cooked, and although I'm gone, life on Earth is still screwed. Game over.
If a GRB hits us in the next 1000 years, the Earth is still cooked, I'm long gone as are the vast majority of my descendants, but maybe mankind (assuming we live that long) will have found the means to leave the planet and preserve itself. However, life on Earth is still screwed. Game over.
Ditto for 10k years, 100k, etc. Basically, there's very little we can do to save the Earth, and next to nothing we can do collectively to save ourselves, except for a few lucky individuals. Thus, the long term goal shouldn't be figuring out how to protect the Earth, but rather we should be figuring out how to preserve our legacy. Fighting against Mother Nature has proven time and time again to be futile.
Re:Earth cooked, news at 11... (Score:5, Funny)
GRB...
Never mind.
Re:OH NOES (Score:5, Funny)
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Re:OH NOES (Score:5, Insightful)
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Re:OH NOES (Score:5, Insightful)
Re:OH NOES (Score:5, Funny)
Then the gamma ray hits.
Re:OH NOES (Score:5, Informative)
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The point I was trying to make was that a star just doesn't go supernova from a normal star with no 'warning' Of course, the last phase just before it reaches the Chandrasekhar limit is very short, and the subsequent collapse IS effectively instantaneous.
But it shows that the star does go through a 'series' of collapses. It was those collapses that I was clumsily referring to as giving off indicators.
For example, if the star did go nov
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