Black hole had 18th century feeding frenzy

pokkets

5-7-2008 4:08 AM

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/9aa60e9a-ccb0-4b8b-9d4d-9cc49b698917/77C900A3-1634-4A8A-BD5B-6B850AB73648/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.abc.net.au/science/articles/2008/05/07/2238100.htm?site=science&topic=latest" href="http://www.abc.net.au/science/articles/2008/05/07/2238100.htm?site=science&topic=latest" style="font-size: 11px;">www.abc.net.au</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/05/07/2238100.htm?site=science&topic=latest"> Irene Klotz</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/05/07/2238100.htm?site=science&topic=latest"><P class="first">About 300 years ago, the black hole lurking in the heart of the Milky Way woke from hibernation and entered a feeding frenzy, triggering a cascade of x-rays that reverberated off nearby clouds, researchers say.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/05/07/2238100.htm?site=science&topic=latest"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/www.abc.net.au/img/C9AB4ABA-E3A6-4397-BAB9-41098FC1FFCD" alt="galactic core" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/05/07/2238100.htm?site=science&topic=latest"><P>The energy released by the event was so intense that echoes remain etched in an interstellar cloud today.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/05/07/2238100.htm?site=science&topic=latest"><P>The findings, reported by Japanese astronomers, may explain why our galaxy's black hole, known as Sagittarius A*, is so laid-back compared to similarly sized monsters in other galaxies.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/05/07/2238100.htm?site=science&topic=latest"><P>"Perhaps it's just resting after a major outburst," says <A target="_blank" href="http://www.kyoto-u.ac.jp/en">Kyoto University</A>'s Tatsuya Inui, lead author of a paper in the <A target="_blank" href="http://pasj.asj.or.jp/"><EM>Publications of the Astronomical Society of Japan</EM></A>. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/05/07/2238100.htm?site=science&topic=latest"><P>Data taken between 1994 and 2005 revealed a quick-lived but intense flash of x-rays from a large cloud known as Sagittarius B2, which lies 300 light-years from the Milky Way's black hole. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/05/07/2238100.htm?site=science&topic=latest"><P>Scientists believe the black hole's frenzy spewed out x-rays that blasted electrons off iron molecules in the cloud.</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/77C900A3-1634-4A8A-BD5B-6B850AB73648/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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Black hole had 18th century feeding frenzy

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