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Primitive dust samples provide pre-solar time capsules
amgumen
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4-21-2009 7:08 PM
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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/cc83d8fd-fad1-4c2e-9fb8-03e2d406d462/5A3264B3-0085-4A5E-B3D9-BAE68A56C584/" 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.alphagalileo.org/AssetViewer.aspx?AssetId=9744&MaxWidth=800&MaxHeight=400" href="http://www.alphagalileo.org/AssetViewer.aspx?AssetId=9744&MaxWidth=800&MaxHeight=400" style="font-size: 11px;">www.alphagalileo.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.alphagalileo.org/AssetViewer.aspx?AssetId=9744&MaxWidth=800&MaxHeight=400"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/www.alphagalileo.org/img/A00D5793-A874-4273-B6F3-E6562175EDD1" alt="http://www.alphagalileo.org/AssetViewer.aspx?AssetId=9744&MaxWidth=800&MaxHeight=400" /></div></blockquote><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://content7.clipmarks.com/images/clip-icon.gif" 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.alphagalileo.org/ViewItem.aspx?ItemId=57040&CultureCode=en" href="http://www.alphagalileo.org/ViewItem.aspx?ItemId=57040&CultureCode=en" style="font-size: 11px;">www.alphagalileo.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.alphagalileo.org/ViewItem.aspx?ItemId=57040&CultureCode=en">The samples were gathered in April 2003 during the Earth's passage through the dust stream left behind by comet 26P/Grigg-Skjellerup</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.alphagalileo.org/ViewItem.aspx?ItemId=57040&CultureCode=en">We found an extraordinary wealth of primitive chemical "fingerprints", including abundant pre-solar grains, true stardust that has formed around other earlier stars, some during supernova explosions, associated with extremely pristine organic matter that must pre-date the formation of our planets</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.alphagalileo.org/ViewItem.aspx?ItemId=57040&CultureCode=en">The interplanetary dust particles, which are only a few thousands of a millimetre in diameter</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.alphagalileo.org/ViewItem.aspx?ItemId=57040&CultureCode=en">While the planets in the inner solar system, such as Earth or Mars, once experienced harsh conditions and have changed substantially over the past 4.5 billion years, comets are believed to store the original material of the early Solar System, acting as ‘supersized refrigerators’. </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.alphagalileo.org/ViewItem.aspx?ItemId=57040&CultureCode=en">We still have much to learn from samples of primitive matter containing large amounts of interstellar grains. </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;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/5A3264B3-0085-4A5E-B3D9-BAE68A56C584/blog/" title="blog or email this clip"><img src="http://content8.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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