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Study Suggests Saturn's Rings Made By Ancient Moon Death Spiral
jibberjabber1 writes with news of a study published in Nature (abstract) that suggests Saturn's rings were created after a Titan-sized moon fell into the planet's atmosphere while the solar system was still young.
"One of the leading theories has been that either some of Saturn's many moons crashed into each other, or that an asteroid crashed into one of them — leaving debris that formed the rings. The trouble has been that Saturn's moons are half ice and half rock and the planet's seven rings are now as much as 95 per cent ice, Robin says. If the rings were formed by a moon-on-moon crash or an asteroid-on-moon crash, there would be more rock in the rings. Something had to have stripped away the outer ice of a moon, she says. Her theory starts billions of years ago when the planet's moons were forming. A large disk of hydrogen gas circled Saturn and that helped both create and destroy moons. Large inner moons probably made regular plunges into the planet, jostled by the disk of gas. These death spirals each took about 10,000 years and the key to understanding the rings' origins is what happened to them during that time. According to Robin's computer model, Saturn stripped the ice away from a huge moon while it was far enough from the planet that the ice would be trapped in a ring. The original rings were 10 to 100 times larger than they are now, but over time the ice in the outer rings has coalesced into some of Saturn's tiny inner moons, Robin says."
In other astronomy news, the Geminid meteor shower is due to reach its peak tonight.
Perhaps he should be tested?
Just in time for Saturnalia! The Titan-sized moon didn't fall into Saturn's atmosphere - it was swallowed.
"In the absence of the ability to establish the attribute of truth they tried to establish the noble attributes."
Perhaps he should be tested?
Ahhh, I love links like that about /. I honestly find it amazing how photographic the average memory here seems to be. It's like anyone can drop a comment/topic and a bunch of links to humor just appear - yet they are for the most part very spot on.
Kudos to you sir!
Moved to http://soylentnews.org/. You are invited to join us too!
I think that this is more applicable, in this instance.
My new goth band, Moon Death Spiral. Who wants to be in it with me? We can sing goth songs about astronomy, physics and math.
"Robin Canup from the Southwest Research Institute has uncovered evidence that the rings came from a large, Titan-sized moon that was destroyed as it spiraled into a young Saturn." Same theory, same author. Just that the Nature article is out now, instead of just a presentation.
Fandroids hate facts.
I doubt it, but at one time the earth did have a ring, acording to present theory.
A Mars-sized body smashed into the earth, and the molten material splashed into orbit. The ring(s) eventually came together to form the moon.
It seems to me that this is more likely what happened to Saturn than having a one of its moons swallowed. Another body not in Saturn's orbit could be travelling a lot faster than one in orbit. Saturn's pretty big, seems its gravity coould prevent a moon from splashing very far.
Anyone care to do the math and tell me if I'm anywhere near reight?
Free Martian Whores!