Raw hypermoon
3 Dec 2010, 14:00 UTC
Stop me if you’ve heard this from me before, but Saturn and its moons are weird. Take Hyperion. 300 km across (180 miles), yet only half as dense as water! Even normal ice is denser than that, so something weird is going on there. It’s most likely that it’s full of holes, like a loosely agglomerated rubble pile. It may be nearly half empty space!
So it’s no surprise that such an odd, odd little world should make such a brooding target of the Cassini spacecraft’s cameras:
Cassini passed about 75,000 km (45,000 miles) from Hyperion on November 28, 2010, and took dozens of images of the moon. It was still 140,000 km (84,000 miles) away and on approach when it snapped the dramatic shot above. The picture is raw and unprocessed, so it still has some "image artifacts" in it; defects in the camera that can be easily corrected using pipeline software. Still, you can get a sense that the moon, well, just ain’t quite right.
Then Cassini got closer, and took many pictures like this next one:
Man, Hyperion is just so weird! The craters don’t look like what we’re used to. The rims are sharp, and ...




