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--- In [email protected], "sunny" <am...@...> wrote: > > http://www.smh.com.au/world/science/scientists-think-they-are-watching-birth-of-a-black-hole-20101116-17vx6.html > > Scientists think they are watching birth of a black hole > Amina Khan > November 17, 2010 > LOS ANGELES: A mysterious object that is eating interstellar gas and emitting > X-rays in a telltale pattern is almost certainly a very young black hole - > the first one humans have been able to observe at such an early stage, > scientists say. > > An amateur astronomer first spotted the object 31 years ago, when it was a > star in the process of exploding into a supernova. Since then, the Chandra > X-ray Observatory and other telescopes have documented that X-rays have been > emitted from the former star at a surprisingly steady rate from 1995 to 2007. > > ''If our interpretation is correct, then it's the first time we're seeing a > black hole being born in a normal supernova,'' said Avi Loeb, a Harvard > University astrophysicist, who reported the discovery in the journal New > Astronomy and described it during a NASA news conference on Monday. > > The black hole - known as SN 1979C - is expected to give scientists a rare > opportunity to track the evolution of one of the more bizarre phenomena in > the cosmos. Black holes are regions of space where matter is so dense that > nothing, not even light, can escape from them. > > ''It is in its infancy,'' Kimberly Weaver, an astrophysicist at NASA's > Goddard Space Flight Centre in Greenbelt, Maryland, said at the news > conference. ''We want to watch how this system evolves and changes in its > youthful stages, from when it is first born to when it grows into a child and > a teenager.'' > > Researchers think the black hole was created by a star that was 20 times more > massive than our sun. > > A junior high school teacher, Gus Johnson, spotted it in 1979 when it was in > its supernova stage. In its collapsed form, it is now about five times more > massive than the sun but is less than 40 kilometres across. > > The black hole appears to have swallowed an Earth's worth of mass in its > short lifetime, Professor Loeb said. At its current rate, it is set to double > its mass in another 40 million years. > > The black hole is 50 million light years away, in one of the Virgo galaxies. > > Los Angeles Times > > > [Non-text portions of this message have been removed] > ------------------------------------ Post message: [email protected] Subscribe : [email protected] Unsubscribe : [email protected] List owner : [email protected] Homepage : http://proletar.8m.com/Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/proletar/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/proletar/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
