July 24, 2007
That's One Helluva Tiramisu

Scientists have discovered that the iron that enriches stars with planets seems to be coming from the planets, and are not part of the star's makeup. Stars which show strong iron signatures are much more likely to have planets than those which don't. Scientists weren't sure whether the star formed with the iron, or if the iron "fell" onto the star like chocolate powder on the dessert in the title. By examining red giant stars with planets, scientists did not find the expected iron signature, strongly suggesting that the iron is pollution from the planetary disk, and not something that the star formed with.

Posted by scott at July 24, 2007 01:56 PM

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