Sunday, June 28, 2009

Overnight and Open Thread

Astronomy Picture of the Day

Fresh Tiger Stripes on Saturn's Enceladus
Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA

Explanation: Do underground oceans vent through the tiger stripes on Saturn's moon Enceladus? Long features dubbed tiger stripes are known to be spewing ice from the moon's icy interior into space, creating a cloud of fine ice particles over the moon's South Pole and creating Saturn's mysterious E-ring. Evidence for this has come from the robot Cassini spacecraft now orbiting Saturn. Pictured above, a high resolution image of Enceladus is shown from a close flyby.

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