Mystery of Saturn's Two-Faced Moon Solved |
Mystery of Saturn's Two-Faced Moon Solved |
Oct 9 2007, 02:31 PM
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Member Group: Members Posts: 524 Joined: 24-November 04 From: Heraklion, GR. Member No.: 112 |
Carolyn Porco comments included in this space.com article :
http://www.space.com/scienceastronomy/0710...ni-iapetus.html |
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Oct 13 2007, 03:54 AM
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#2
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
If I recall correctly, Phoebe has long been considered a candidate for the source of the dark material, but I think that spectrally, Phoebe is, strangely enough, a better match to Iapetus' <i>bright</i> material than the dark stuff. I also seem to recall that Phoebe, though dark, is not as dark as Iapetus' dark material. I think. Somebody search around and check on these, I am not confident that I am remembering these things right.
--Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Oct 13 2007, 05:06 PM
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#3
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
That's correct. Of all the significant moons of Saturn, Cassini Regio on Iapetus is the darkest (around 0.04 albedo, compared to about 0.06 of Phoebe).
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