Earth at threat from rogue black holes


	Earth at threat from rogue black holes

invictus

1-11-2008 4:10 PM

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tags:

astrophysics, black holes, galaxy, science

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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://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/d09b020e-12a2-4a3e-93cf-b7221177cb5c/191FDE56-BC9A-4A0C-86AA-5491B34898B8/" 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.cosmosmagazine.com/node/1777" href="http://www.cosmosmagazine.com/node/1777" style="font-size: 11px;">www.cosmosmagazine.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.cosmosmagazine.com/node/1777"><P>NEW YORK: Hundreds of undetected black holes, each with a mass thousands of times greater than the Sun, might be stealthily roving our galaxy, ready to devour anything that crosses their paths.</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.cosmosmagazine.com/node/1777"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/www.cosmosmagazine.com/img/215BDB21-D649-4241-8FC3-69C013C2A01B" alt="Earth at threat from rogue black holes" /></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.cosmosmagazine.com/node/1777"><P>These 'rogue' black holes would be very difficult to spot, said Kelly Holley-Bockelmann, an astronomer at Vanderbilt University in Tennessee, USA. </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.cosmosmagazine.com/node/1777"><P>"Unless it's swallowing a lot of gas, about the only way to detect the approach of such a black hole would be to observe the way in which its super-strength gravitational field bends the light that passes nearby," she added. </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.cosmosmagazine.com/node/1777"><P>The model predicted the behaviour of a hypothetical class of so-called intermediate-mass black holes, whose origins are still mysterious. These black hole 'middleweights' are thought to have masses mid-way between that of the two classes of most well-known black holes.</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/191FDE56-BC9A-4A0C-86AA-5491B34898B8/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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