The Sad Story of Peggy, Saturn’s Newest Moon

Often, the time frames on which celestial objects operate don’t conveniently fit into a human lifetime.

So, people were pretty excited last year when scientists announced they might have caught a new moon in the act of forming. Named Peggy, the newbie hiding in Saturn’s A ring had been spotted in images taken by NASA’s Cassini spacecraft in April 2013.

“You couldn’t miss it. It was a very bright, kind of extended object, somewhere near the edge of the ring,” says astronomer Carl Murray, of Queen Mary University of London. Murray first spotted Peggy, and he ended up ...

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