How old are Saturn's rings? Photo

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	How old are Saturn's rings? Photo

dorine

12-17-2007 10:32 AM

492 views

tags:

saturn, rings, moon, astronomy, space

dorine says:

Is that the moon Mimas in the shot?

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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:#cccccc;"><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/c61e26d6-9a50-4da4-bc17-a35707492960/C7C1E0D5-C1DA-463B-88E0-73C881A2BC3A/" 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://antwrp.gsfc.nasa.gov/apod/astropix.html" href="http://antwrp.gsfc.nasa.gov/apod/astropix.html" style="font-size: 11px;">antwrp.gsfc.nasa.gov</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://antwrp.gsfc.nasa.gov/apod/astropix.html"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/antwrp.gsfc.nasa.gov/img/5C60B41C-69CD-4CD1-BCF4-EAC0F3FE9562" alt="See Explanation.  Clicking on the picture will download
 the highest resolution version available." /></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://antwrp.gsfc.nasa.gov/apod/astropix.html">
How old are Saturn's rings?  
No one is quite sure. 
One possibility is that the rings formed relatively recently in our
Solar System's history, perhaps only about 100 million years ago when
a moon-sized object 
<A href="http://en.wikipedia.org/wiki/Roche_limit">broke up</A> near Saturn.</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://antwrp.gsfc.nasa.gov/apod/astropix.html"><A href="http://www.jpl.nasa.gov/news/news.cfm?release=2007-149">New
evidence</A>, however, raises the possibility that some of 
<A href="http://en.wikipedia.org/wiki/Saturn%27s_rings">Saturn's rings</A> 
may be billions of years old and so almost as 
<A href="http://en.wikipedia.org/wiki/Edna_Parker">old</A> as Saturn itself.</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://antwrp.gsfc.nasa.gov/apod/astropix.html">  
<A href="http://photojournal.jpl.nasa.gov/catalog/PIA09788">Seen here</A>, 
Saturn's rings were imaged in their true colors by the 
<A href="http://en.wikipedia.org/wiki/Cassini%E2%80%93Huygens">robotic
Cassini</A> in late October.  
Icy bright <A href="http://antwrp.gsfc.nasa.gov/apod/ap070909.html">Tethys</A>, 
a moon of Saturn likely brightened by a sandblasting 
<A href="http://antwrp.gsfc.nasa.gov/apod/ap071013.html">rain of ice</A> from sister moon 
<A href="http://antwrp.gsfc.nasa.gov/apod/ap060310.html">Enceladus</A>, is visible in front of
the darker rings.</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/C7C1E0D5-C1DA-463B-88E0-73C881A2BC3A/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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