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Originally Posted by CharlieO
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More than 200 years ago, the philosopher Emmanuel Kant first proposed that planets are born from disks of dust and gas that swirl around their home stars. Though astronomers have detected more than 200 extrasolar planets and have seen many debris disks around young stars, they have yet to observe a planet and a debris disk around the same star....
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Erhm...until recently at any rate.
Baby planet found around star HL Tau - Telegraph
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A baby planet has been glimpsed by astronomers in a "womb" of dust and debris around a young star. ...
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Do we really need to start a new thread on all this? At the very least, let's link to the past discussions.
Consider Hydrogen for Earth's Core
Hydrogen escape into space, how much?
