In its last days, the Cassini spacecraft looped between Saturn and its rings so that Earth-based radio telescopes could track the gravitational tug of each. Scientists have now used these measurements to determine the mass of the rings and estimate its age, which is young: 10-100 million years. This supports the hypothesis that the rings are rubble from a comet or Kuiper Belt object captured late in Saturn's history.
from All Top News -- ScienceDaily https://www.sciencedaily.com/releases/2019/01/190117142159.htm
from All Top News -- ScienceDaily https://www.sciencedaily.com/releases/2019/01/190117142159.htm
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