Planet-Forming Stars

For an interesting sidelight to our immediately preceding post on exoplanets, see Dirty Stars Make Good Solar System Hosts:

“The Sun’s abundance of heavy elements suggests its protoplanetary disk (the disk from which the Solar System formed) had close to the critical ratio of pebbles to gas; if the abundance of heavy elements had been slightly less, planetesimals and planets would have been far less likely to form, and we would not be here to study the question.”

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Published in: on October 7, 2009 at 3:19 pm  Leave a Comment  

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