Wednesday, April 9, 2014

Rings around an asteroid...

Rings around an asteroid...  The video at right is via APOD, and shows graphically how astronomers recently discovered the existence of Saturn-like double ring system around the asteroid 10199 Chariklo.  Click on the APOD link for more details.  I particularly like the way a simple photometer, recording a star's brightness when Chariklo occulted it, provided solid evidence for the rings...

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