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Oct 5, 2021 · Key Takeaways. Iapetus, the second moon ever discovered around Saturn back in 1671, has three bizarre properties that science still struggles to explain. It orbits out of Saturn’s plane and has a...
- Ethan Siegel
The heavily cratered surface of the ridge implies that it was formed very early in the history of Iapetus. Models suggest that it was formed by motions of a thin, active ice lithosphere when deeper layers of the moon were warm.
Iapetus is heavily cratered, and Cassini images have revealed large impact basins, at least five of which are over 350 km (220 mi) wide.
The surface of Iapetus is heavily cratered, with large impact basins up to 580 kilometres across. Surface darkening on Iapetus comes from organic materials left behind as ice in the warmer Cassini Region region sublimates.
Jan 1, 2014 · Spacecraft images reveal that both the dark and light hemispheres of Iapetus are heavily cratered. At first glance, the material did seem to be welling up inside some craters, but further study hinted at a rain of material falling onto the leading side of the moon.
- Michael Carroll
- 2015
Jan 1, 2005 · This image reveals a heavily cratered surface and shows the boundary between Iapetus' bright trailing hemisphere and Cassini Regio -- a large, dark region that covers the leading hemisphere of the moon’s surface.
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Sep 12, 2007 · Pictures returned late Tuesday and early Wednesday show the moon's yin and yang--a white hemisphere resembling snow, and the other as black as tar. Images show a surface that is heavily cratered, along with the mountain ridge that runs along the moon's equator.
