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With a diameter of 396 kilometres (246 mi) it is the smallest astronomical body that is known to be rounded in shape because of self-gravitation.
With a diameter of 396 kilometres (246 mi) it is the smallest astronomical body that is known to be rounded in shape because of self-gravitation.
originally posted by: stormcell
To think some craters are over 250 miles in diameter and that the original collider was 12 to 25 miles across and vapourised instantly at the point of collision.
originally posted by: carewemust
How can there be such a wide variety of moons circling Saturn? Some are smooth, some are crater-lumpy...Titan almost looks like it has an atmosphere, with clouds.
The theory of the solar system's formation is that clumps of materials cooled to form the planets and their satellites. If true, shouldn't the "clump" that coalesced into the Saturn and it's moons, be made of the same material..thereby causing all the moons to look nearly the same?