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Major Dude
Join Date: Nov 2002
Location: East Coast of Aus
Posts: 1,467
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stars rebirth?
i was looking through a New Scientist magazine at school and found this article
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#2 |
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Major Dude
Join Date: Nov 2002
Location: East Coast of Aus
Posts: 1,467
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and because winamp has a 103kb file limit(which sux) i have to post another reply because its 117kb, that sux
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#3 |
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Forum King
Join Date: Dec 2001
Location: Thoron fields and Duranium shadows. Posts: Crap mostly
Posts: 8,003
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Damb thats hard to read, I'll transcribe the bit that I can.
In Space time drag, Pick out any star in the Milky Way, and the chances are it has shone throuhout the entire history of life on earth. While people live and die like mayflies, the stars twinkle on, changrless (I carnt see that too good) for millions of years. So astronomers were astonished when in 1996, a sharp-eyed amature spotted a star than, after first dying and shrinking to a glowing earth sised ember, suddenly sprang back to life. In just a couple of Years, it ballooned into a monster more than 100 times wider than the sun. "Arguably (Again its hard to read), this was the fastest case of stellar evolutionn ever witnessed." says Martin A*pland of austrailias Mount stromlo Observatiry nere Canberra. The star, known as Sakurai's object, soon faded into darkness inside a cocoon of dust. But its is now staging anougher tantrum, blowing gales into space at hundreds of kilometers per second. As astromers jostle for time on the worlds most powerful telescopes to watch it, they are also struggling to understand this born-again giant. They do know one think though: Sakural's object is not freak of nature. as many as 20% of all lightweight stars might be reborn when they come to the end of there lives, And that includes our nearest star. "From what we understand todaym the sun is a prime candidate for going through a born-again phase" says Asptund. Member most in need of SpellCheck Lifetime Achievement Award I'm a Twitch Streamer these days, it's weird. |
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#4 |
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Forum King
Join Date: Dec 2001
Location: Thoron fields and Duranium shadows. Posts: Crap mostly
Posts: 8,003
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Next part.
Not everyone was caught off-guard b Sakural's discovery, however, in 1983 astronomer Loko Iben (WTF is that supposed to be?) at the Univercity of Illianois at Urbana Champaign and his colleagues proposed that dead stars could spring back to life. Theye were trying to explain the mysterious properties of some whight dwarfs - dead stars than have burned nearly all there hidrogen and helium fuel, leaving mainly carbon and Oxygen. Incapable of nuclear reactions, the wight hot starry embers shrink to a core about the syse of Earth. According to modles of stellar evolutions, whit dwarfs should havs an outer coating of hydrogen gas that failed to ignight. For decades though, astronomers had been puzzled to fined elderly stars that din't show any of the spectral "Fingerprints" of hydrogen. "The Universe is abolutely dominated by hydrogen. So to find objects whith hardly any hydrogen-in some cases none at all-that is just so bizarre." says Don Pollacco, an astronomer at Queen's univercity Belfast. To explain how thease misfits came about, Iben and colleages calculated what would happen if a star suddenly stopped burning helium before shrinking to a white dwarf. There models showed that as the star becomes a tiny corpse the size of earth, instabillities could once again spark violent nuclear reactions in the remaining helium. Thease would be so fierce that the dence ember would turn itself inside out and swell to an almightly giant, draging the remaining hydrogen deep into the interior. According to Iben's calculations all this would last several decades and after a century or so the star would fade back into whit dwarfness. A trawl of old photographic plates sugested that they might be right. In 1929 (or 39 not sure) the German astronomer Max Wolf saw a star in the constelation Aquila (the Eagle) suddenly flare up. Then in 1921 (that carnt be right?) Swedish astronomer Karul Lundmark analised the stars spectrum and saw that it contained very little hydrogen. No one suspected the importance of his result until the 1970's, when astronomers in the US and (zip number 2's picture is legable so no transcription needed) unfortunatly picture 3 is to far gone, I carnt make any of it out. its in zip 1. Member most in need of SpellCheck Lifetime Achievement Award I'm a Twitch Streamer these days, it's weird. |
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#5 |
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Major Dude
Join Date: Nov 2002
Location: East Coast of Aus
Posts: 1,467
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yeah, sorry bout size, but if it any larger, it couldn't put it up, with out putting up each induvidual page
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