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Fraser
2005-Apr-28, 05:14 PM
SUMMARY: NASA's Cassini spacecraft has taken the best image so far of Saturn's small, irregular moon Epimetheus. Cassini took this photograph when it was only 74,600 kilometers (46,350 miles) away from the rocky moon. Clearly visible in the image is a large crater called Hilairea, which has a diameter of about 33 kilometers (21 miles). It takes up a large chunk of Epimetheus' surface, considering the moon is only 116 kilometers (72 miles) across.

View full article (http://www.universetoday.com/am/publish/close_view_epimetheus.html)

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om@umr.edu
2005-Apr-28, 05:37 PM
It is interesting that impact craters extend to the far reaches of the solar system.

This certainly lends credence to the view that objects have been smashing into each other.

I wonder if the shape of the crator left behind might contain information on the composition of the impacting object. I.e., might the crater's shape distinguish a piece of iron from a piece of ice?

With kind regards,

Oliver
http://www.umr.edu/~om

antoniseb
2005-Apr-28, 05:38 PM
I like the detailed images we get sometimes of large irrgular objects floating around in space. We have over 100,000 asteroids and comets with known orbits, but we can't have a dozen yet that we have images this good of. This isn't an asteroid, but it sure looks like one.