Boom and bust shapes Saturn's rings

 作者:季萸     |      日期:2019-02-28 01:08:00
By Lisa Grossman (Image: JPL/Space Science Institute/NASA) (Image: JPL/Space Science Institute/NASA) SATURN’S rings are far from the serene place you might imagine. Instead, they resemble a space beltway where high-speed crashes between icy particles create and destroy snowballs the size of mountains. This constant thrum of activity could explain how moonlets emerge from the rings, and perhaps even show how planets materialise around a star. “We used to think of the rings as a perfect, placid society where nothing ever happens,