Orion twins show not all are identical


	Orion twins show not all are identical

pokkets

6-30-2008 2:46 AM

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pokkets says:

The fact that the twins are different means the study of their eclipses, can shed more light on the formation of stars, and they are one of the yardsticks astronomers can use to test their theories on star formation. The information gained can help revise some theories that exist at the moment, including the ages of star types.

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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/6e28a700-b2ae-4fba-bae3-619c886e844f/0FF00ABE-ED23-4E9D-BE47-CF3A8482A8E4/" 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/2008/06/30/2289910.htm?site=science&topic=latest" href="http://www.abc.net.au/science/articles/2008/06/30/2289910.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/2008/06/30/2289910.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/2008/06/30/2289910.htm?site=science&topic=latest"><P class="first">A pair of stars in the Orion nebula have shown astronomers that stars born at the same time, in the same parent cloud, don't necessarily have the same physical attributes. </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/2008/06/30/2289910.htm?site=science&topic=latest"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/www.abc.net.au/img/086C0AA8-7249-4F9B-B389-68DDAEB406EA" alt="orion nebula" /></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/2008/06/30/2289910.htm?site=science&topic=latest">The twins, known as Par 1802, reveal one is developmentally delayed compared to its partner</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/2008/06/30/2289910.htm?site=science&topic=latest">Par 1802 provides direct evidence that birth order in 'identical twin' stars can manifest itself as observable physical difference</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/2008/06/30/2289910.htm?site=science&topic=latest">says <A target="_blank" href="http://www.vanderbilt.edu/">Vanderbilt University</A></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/2008/06/30/2289910.htm?site=science&topic=latest">Professor Keivan Stassun in the journal <A target="_blank" href="http://www.nature.com"><EM>Nature</EM></A></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/2008/06/30/2289910.htm?site=science&topic=latest"><P>The discovery is more than a curiosity: Par 1802 is an eclipsing binary star system, meaning the twins periodically orbit in front of one another, relative to earth, temporarily and regularly blocking its partner's light. </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/2008/06/30/2289910.htm?site=science&topic=latest"><P>Such phenomena are yardsticks for measuring stars' basic physical properties and for testing theories about stellar evolution. </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/2008/06/30/2289910.htm?site=science&topic=latest"><P>The finding may mean that thousands of young stars may need to have their ages readjusted by as much as 20% for average-sized stars and 50% for low-mass stars like brown dwarfs. </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/0FF00ABE-ED23-4E9D-BE47-CF3A8482A8E4/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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