Space & Astronomy
April 5, 2011 ·
4 comments
Image Credit: NASA
Source: Nature.com | Comments (4)
Crashing comets make rings ripple
By T.K. RandallApril 5, 2011 ·
4 comments
Image Credit: NASA
Wobbles in the rings of Saturn and Jupiter preserve a record of past impacts.
Imagine walking along a well-trod path past a lake and seeing ripples in the surface of the water that seem frozen in time and then you learn that those ripples were made thousands of years ago. Something similar has happened with astronomers and the rings around Saturn, only these ripples have lasted a lot longer and could offer a lot of more valuable information.The rings of Saturn and Jupiter contain ripples caused by comets that hit them decades ago. Monitoring how the rings wobble could reveal how common comet impacts are – and may also help astronomers map the planets' cores.
Source: Nature.com | Comments (4)
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