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Monday, November 17, 2014

Science: the black hole conundrum

A high resolution mid-infrared picture taken of the center of our Milky Way galaxy reveals details about dust swirling into the black hole that dominates the region. - Image Credit: Dr. Mark Morris (UCLA) Keck II, Mirlen instrument, keckobservatory.org
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A number of different astronomers have stated that each galaxy has a supermassive black hole at its center. Or at the least, most galaxies, ours included. How can this be? Modern culture would have us believe black holes suck in all surrounding matter once it crosses the event horizon. A page about black holes at NASA Chats - Ask an expert says:
Black holes are really just the evolutionary end points of massive stars. 

Even more intriguing, but somehow reassuring, too.  The end of life may generate a new beginning. Joseph Conrad's Heart of Darkness keeps coming to mind. An article at Cosmotography--A Singular Place--explores the relationship between a black hole and its surrounding galaxy.

Some interesting work observing the black hole called Sagittarius A*, at the center of our galaxy, the Milky Way, is being done. A relatively new device for observation is NASA's NuSTAR (video posted by Teknociencia).
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Sgr A* is a research topic for astronomer James Lyke at the Keck Observatory in Hawaii. Recently he's captured some good information about the black hole, using several complementary technologies. Note in the video below, posted by the Science Channel, what it takes in terms of manpower and mechanical positioning to capture such information.
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You can track current news about Keck Observatory at this dedicated site.

-- Marge


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