One thing that they didn't really cover was the shadows cast by the rings. I found myself staring in fascination at where those shadows fell and wondering how/if that would affect climate and growing seasons/placement of crops.
The reason the giant planets like Jupiter, Saturn, Uranus and Neptune have rings (however vestigial) and that small rocky planets like Earth, Mars, Venus and Mercury don't is that the big planets' gravitational fields are strong enough to tear moons apart to make them.
In other words, Earth and rings will only be possible if the LHC really does create that great big black hole we've been promised.
Correct, and I don't think rings would be good for life as we know it, on planet. However, we don't know much of anything about so-called Super Earths, and they could both have rings and be habitable.
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Date: 2009-11-22 04:10 pm (UTC)In other words, Earth and rings will only be possible if the LHC really does create that great big black hole we've been promised.
Sorry.
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Date: 2009-11-22 05:59 pm (UTC)