Did Earth once have multiple moons?

wildcat

5-6-2008 6:34 AM

488 views

see more clips

The Best of ‘Feel Art Again’

Cool site for the strange and unus...

Colors of the Night Sky

Spike Milligan - First Irish Rocke...

Can We Return Man to the Moon?

Clouds Over The Earth, Earth Under...

Outdoor Planting Table For 2008

clips by wildcat

Is life a gift?

The (Needed) New Economics of Abun...

Personal Nanotech, end of poverty,...

Embed This Clip In Your Site...

<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/a19d6162-5ce1-45af-9153-f6c9e99c2dca/D7CE344F-49E4-47C0-81D6-658017602CA2/" 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/dn13836-did-earth-once-have-multiple-moons.html?DCMP=ILC-hmts&nsref=news3_head_dn13836" href="http://space.newscientist.com/article/dn13836-did-earth-once-have-multiple-moons.html?DCMP=ILC-hmts&nsref=news3_head_dn13836" 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/dn13836-did-earth-once-have-multiple-moons.html?DCMP=ILC-hmts&nsref=news3_head_dn13836"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/space.newscientist.com/img/CB39C8DB-8D44-4435-B497-A53D72E4F059" alt="The Moon may once have had siblings (Image: NASA)" /></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://space.newscientist.com/article/dn13836-did-earth-once-have-multiple-moons.html?DCMP=ILC-hmts&nsref=news3_head_dn13836"><P>The ancient catastrophe that gave birth to the Moon may have produced additional satellites that lingered in Earth's skies for tens of millions of years.</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/dn13836-did-earth-once-have-multiple-moons.html?DCMP=ILC-hmts&nsref=news3_head_dn13836"><P>A new model suggests moonlets may have once occupied the two Earth-Moon <A target="ns" href="http://www.physics.montana.edu/faculty/cornish/lagrange.html" linkindex="25">Lagrangian points</A>, regions in space where the gravitational tug of the Earth and the Moon exactly cancel each other out. Objects trapped in these points are called Trojans and can remain stationary forever if left undisturbed.</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/dn13836-did-earth-once-have-multiple-moons.html?DCMP=ILC-hmts&nsref=news3_head_dn13836"><P>Scientists think the Moon was <A href="http://space.newscientist.com/article/mg19826525.500-moons-birth-changed-the-length-of-days-on-earth.html" linkindex="26">created</A> when Earth was struck by a Mars-sized object some 4.5 billion years ago.</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/dn13836-did-earth-once-have-multiple-moons.html?DCMP=ILC-hmts&nsref=news3_head_dn13836"><P>"The giant impact that likely led to the formation of the Moon launched a lot of material into Earth orbit, and some could well have been caught in the Lagrangian points," says study team member Jack Lissauer of NASA Ames Research Center in California, US.</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/dn13836-did-earth-once-have-multiple-moons.html?DCMP=ILC-hmts&nsref=news3_head_dn13836">Once captured, the Trojan satellites likely remained in their orbits for up to 100 million years,</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/D7CE344F-49E4-47C0-81D6-658017602CA2/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>

tags:

moon, sibling

1 Comment |

Add a Comment

5-6-2008 8:37 PM

zadoz

through the study of opalization in rock shows increased gravational pulls toward the equator at least 3 times in earths history....theorizing satellites entropy the cause..........4 moons would be cool & scary

Login to Comment. Not a member yet? Sign up