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Fraser
2005-Jun-28, 04:33 PM
SUMMARY: NASA's Cassini spacecraft took this photograph of Janus, one of Saturn's many moons. The 181 km (113 mile) moon is covered with craters and patches of dark material exposed by numerous impacts. Astronomers think that Janus may be a porous object, largely composed of water ice. This image was taken when Cassini was approximately 357,000 km (222,000 miles) away from Janus.

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

What do you think about this story? Post your comments below.

lswinford
2005-Jun-28, 06:28 PM
So if Saturn had captured a comet, which now orbits like a moon, how would that appear any different than Janus or Phoebe?

antoniseb
2005-Jun-28, 06:39 PM
Originally posted by lswinford@Jun 28 2005, 06:28 PM
if Saturn had captured a comet, which now orbits like a moon, how would that appear any different than Janus or Phoebe?
They would be smaller. Comets nuclei are a fraction of the size of Janus.

Janus and Phoebe may be slightly evolved KBOs.

Nick4
2005-Jul-26, 03:27 AM
This is the story in my Astronomy magazien.