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Is dark energy lurking in hidden spatial dimensions?
SurfingTheTao
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3
8-17-2007 4:14 PM
268 views
tags:
physics
,
science
SurfingTheTao
says:
Ok, so much of this is beyond me, but I am still intrigued.
2 Comments
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9-15-2007
8:21 PM
davboz
I hear ya.
Beyond me but damn interesting.
9-15-2007
11:47 PM
skwirlinator
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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/4cd6208c-ee27-4451-af76-c20caa9b1da2/AD6B0954-4F95-4954-8B46-6CFFBDAFAC86/" 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://space.newscientist.com/article.ns?id=dn12261&feedId=online-news_rss20" href="http://space.newscientist.com/article.ns?id=dn12261&feedId=online-news_rss20" style="font-size: 11px;">space.newscientist.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://space.newscientist.com/article.ns?id=dn12261&feedId=online-news_rss20"><P>The mysterious cosmic presence called <A href="http://www.newscientist.com/article/mg19325911.700-dark-energy-seeking-the-heart-of-darkness.html">dark energy</A>, which is accelerating the expansion of the universe, might be lurking in hidden dimensions of space. The idea would explain how these dimensions remain stable – a big problem for the unified scheme of physics called <A href="http://www.newscientist.com/channel/fundamentals/mg19526121.200-string-theory-the-fightback.html">string theory</A>.</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://space.newscientist.com/article.ns?id=dn12261&feedId=online-news_rss20">Ever since astronomers discovered in the mid-1990s that other galaxies are accelerating away from us, physicists have struggled to explain why. </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://space.newscientist.com/article.ns?id=dn12261&feedId=online-news_rss20">Even though the vibration is imprisoned in these other dimensions, it can extend its gravitational influence into our space. Its gravity is also repulsive in our space, just like the "ordinary" cosmological constant, so it would cause cosmic acceleration.</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://space.newscientist.com/article.ns?id=dn12261&feedId=online-news_rss20"><P>If Adelberger's pendulum does start to see gravity grow below 0.01 millimetre, it could be a sign that Greene and Levin are right, and the force that's tearing our universe apart really is an invader from another dimension.</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;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/AD6B0954-4F95-4954-8B46-6CFFBDAFAC86/blog/" title="blog or email this clip"><img src="http://content6.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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