Astronomers Find Farthest Known Galaxies


	Astronomers Find Farthest Known Galaxies

DMCourt

7-11-2007 4:53 PM

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tags:

galaxies, astronomy, universe

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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/54d80543-4c58-4698-b4d7-3737b61054ba/CF1C36A5-4F22-4DD8-8827-99517108B5C2/" 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://news.yahoo.com/s/space/20070710/sc_space/astronomersfindfarthestknowngalaxies%3B_ylt%3DAsiuFIhweq2.vsXxwK9PSj0DW7oF" href="http://news.yahoo.com/s/space/20070710/sc_space/astronomersfindfarthestknowngalaxies%3B_ylt%3DAsiuFIhweq2.vsXxwK9PSj0DW7oF" style="font-size: 11px;">news.yahoo.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.yahoo.com/s/space/20070710/sc_space/astronomersfindfarthestknowngalaxies%3B_ylt%3DAsiuFIhweq2.vsXxwK9PSj0DW7oF"><P>The galaxies are seen as they existed just 500 million years after the birth of the universe. Their light, traversing the cosmos for more than 13 billion years, was seen only because it was distorted in a natural "gravitational lens" created by the gravity-bending mass of a nearer cluster of 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://news.yahoo.com/s/space/20070710/sc_space/astronomersfindfarthestknowngalaxies%3B_ylt%3DAsiuFIhweq2.vsXxwK9PSj0DW7oF"><P>The universe is estimated to be <A href="http://us.rd.yahoo.com/dailynews/space/sc_space/storytext/astronomersfindfarthestknowngalaxies/23690299/SIG=121q3sovp/*http://www.space.com/scienceastronomy/map_discovery_030211.html">13.7 billion years old</A>, so that puts the <A href="http://us.rd.yahoo.com/dailynews/space/sc_space/storytext/astronomersfindfarthestknowngalaxies/23690299/SIG=1diek3gfo/*http://www.space.com/php/multimedia/imagedisplay/img_display.php?pic=070710_galaxy_lens_02.jpg&cap=The+six+record-setting+galaxies+located+by+gravitational+lensing.+Each+image+reveals+a+faint+spectrum+line+%28circled%29+in+the+infrared+spectral+region%2C+which+the+astronomers+interpret+as+arising+from+a+line+of+neutral+hydrogen%2C+significantly+%27redshifted%27+from+its+normal+location+in+the+ultraviolet.+Credit:+Caltech%0D%0A">newfound galaxies</A> at 13.2 billion light-years away. A light-year is the distance light travels in a year, about 6 trillion miles (10 trillion kilometers).</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://news.yahoo.com/s/space/20070710/sc_space/astronomersfindfarthestknowngalaxies%3B_ylt%3DAsiuFIhweq2.vsXxwK9PSj0DW7oF"><P>The galaxies offer a glimpse of an era shortly after the first stars formed. </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://news.yahoo.com/s/space/20070710/sc_space/astronomersfindfarthestknowngalaxies%3B_ylt%3DAsiuFIhweq2.vsXxwK9PSj0DW7oF"><P>"That we should find so many distant galaxies in our small survey area suggests they are very numerous indeed," Stark said. "We estimate the combined radiation output of this population could be sufficient to break apart (ionize) the hydrogen atoms in space at that time, thereby ending the Dark Ages."</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/CF1C36A5-4F22-4DD8-8827-99517108B5C2/blog/" title="blog or email this clip"><img src="http://content9.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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