<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/d12f554d-a602-4cc1-bf38-314f53a79570/C5D6A3A8-081A-41AC-85E7-1D04D4F9871E/" 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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery.html" href="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery.html" style="font-size: 11px;">science.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery.html"><DIV class="caption">Of the thousands of known comets in the solar system, Halley's comet is one of some 200 that are periodic. Halley's comet orbits Earth every 76 years; the next flyby will occur in 2061. </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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery.html"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/science.nationalgeographic.com/img/994247A2-8B07-4014-98B1-9191A53BA349" alt="Photo: Halley's comet" /></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://content8.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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/neat-comet.html" href="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/neat-comet.html" style="font-size: 11px;">science.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/neat-comet.html">Comet C/2001 Q4, also known as NEAT, emits a blue-and-purple glow </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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/neat-comet.html"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/science.nationalgeographic.com/img/E13342D7-09E4-49C2-9D8D-452764DC1E8F" alt="Photo: Comet glowing amid stars" /></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://content6.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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-probe.html" href="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-probe.html" style="font-size: 11px;">science.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-probe.html">ejected material that was propelled into space when NASA's Deep Impact probe collided with comet Tempel 1 </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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-probe.html"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/science.nationalgeographic.com/img/01BD165D-690B-45C6-8671-927B2AB96314" alt="Photo: Comet after collision with probe" /></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://content8.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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/wild2-comet.html" href="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/wild2-comet.html" style="font-size: 11px;">science.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/wild2-comet.html">comet Wild 2 ejects dust and gas streams into space</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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/wild2-comet.html"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/science.nationalgeographic.com/img/EBAB4EE3-E9AE-4BFA-9934-6442C6474D63" alt="Photo: Surface of a comet" /></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://content6.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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/hale-bopp.html" href="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/hale-bopp.html" style="font-size: 11px;">science.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/hale-bopp.html"> Hale-Bopp comet</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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/hale-bopp.html"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/science.nationalgeographic.com/img/06347F11-7195-4185-B22A-0FBDEC100199" alt="Photo: Hale-Bopp comet in the night sky" /></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://content8.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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/ceres.html" href="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/ceres.html" style="font-size: 11px;">science.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/ceres.html">Ceres, the largest object in the asteroid belt between Mars and Jupiter</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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/ceres.html"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/science.nationalgeographic.com/img/587F326A-6F5B-47D8-A1BB-D48E390B8C68" alt="Photo: Solar system object Ceres" /></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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/meteor-crater.html" href="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/meteor-crater.html" style="font-size: 11px;">science.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/meteor-crater.html">Meteor Crater formed about 50,000 years ago when a 100-foot-wide (30-meter-wide) meteor weighing 100,000 tons slammed into the Arizona desert</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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/meteor-crater.html"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/science.nationalgeographic.com/img/FDD40141-809F-473F-ACDD-64506EB5E20C" alt="Photo: Meteor Crater in Arizona" /></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://content9.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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/shoemaker-levy-comet.html" href="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/shoemaker-levy-comet.html" style="font-size: 11px;">science.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/shoemaker-levy-comet.html">Comet P/Shoemaker-Levy 9 </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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/shoemaker-levy-comet.html"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/science.nationalgeographic.com/img/33682455-FF4A-4F1A-A665-78EEC27C9942" alt="Photo: Shoemaker-Levy 9 comet" /></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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-jupiter.html" href="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-jupiter.html" style="font-size: 11px;">science.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-jupiter.html">Fragments of comet P/Shoemaker-Levy 9 struck Jupiter in July 1994, leaving the impacts visible in this ultraviolet image.</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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-jupiter.html"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/science.nationalgeographic.com/img/4FC9F930-B4FB-41FC-ABCE-488ECB746EEF" alt="Photo: Dark spots on Jupiter" /></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://content9.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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-tempel-1.html" href="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-tempel-1.html" style="font-size: 11px;">science.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-tempel-1.html">Tempel 1 comet </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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/comet-tempel-1.html"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/science.nationalgeographic.com/img/84B763B6-8940-4DF7-858B-E33F15EB657D" alt="Photo: Comet in red glow" /></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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/tempel-1-dust.html" href="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/tempel-1-dust.html" style="font-size: 11px;">science.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/tempel-1-dust.html">A new jet of dust streams from the icy nucleus of the Tempel 1 comet</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://science.nationalgeographic.com/science/photos/asteroids-comets-gallery/tempel-1-dust.html"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/science.nationalgeographic.com/img/CD39CCCA-B73C-4985-B15D-6D171E490C50" alt="Photo: Jet of dust from a comet" /></div></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/C5D6A3A8-081A-41AC-85E7-1D04D4F9871E/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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