New Chronology of the Saturn Planetary System
This mosaic of Saturn’s moon Mimas showing its cratered surface was created from images taken by NASA’s Cassini spacecraft. A new chronology for the moons of Saturn has been developed by Planetary Science Institute Associate Research Scientist Samuel W. “Most studies dating surfaces on the Moon or Mars rely on counting how many impact craters have formed and knowing the cratering rate, but on the moons of Saturn, we do not know the cratering rate,” said Bell, author of “Relative Crater Scaling Between the Major Moons of Saturn: Implications for Planetocentric Cratering and the Surface Age of Titan” appearing in the Journal of Geophysical Research: Planets. “Previous chronologies of the Saturn system have assumed that the craters on the moons of Saturn virtually all came from objects orbiting the Sun.” . “If the impacts came solely from Sun-orbiting objects, the relative cratering rate would be much, much higher the closer the moons are to Saturn.
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