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alternatives to gravity
pascual
follow
2
5-31-2008 8:01 PM
178 views
tags:
cosmology
pascual
says:
physics
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6-2-2008
4:26 PM
Kauaiguy
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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://www.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/a74e5cf7-edce-4125-83f0-8451e959fe6d/DA73F8C3-8ED3-469B-9FA8-015861B42DBB/" 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://physicsworld.com/cws/article/print/24991" href="http://physicsworld.com/cws/article/print/24991" style="font-size: 11px;">physicsworld.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://physicsworld.com/cws/article/print/24991">Mannheim's theory is still a geometric theory of gravity, but instead of tweaking general relativity he replaces the theory with one based on a fourth-order "Weyl tensor". While the mathematics of conformal gravity is complex, the theory has the highly desirable property that gravity is attractive at local scales yet repulsive at cosmological scales. As such, Mannheim's theory can account for both the accelerating-universe data and galaxy-rotation curves without dark matter, dark energy or any "fudging" of parameters. Like STVG, however, the full cosmological implications of conformal gravity still have to be worked out.</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/DA73F8C3-8ED3-469B-9FA8-015861B42DBB/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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