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Space Rock

I am very excited by this new rock discovery.

"A new planet-hunting technique has detected the most Earth-like planet yet around a star other than our sun, raising hopes of finding a space rock that might support life."

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( 2 comments — Leave a comment )
weelisa
Jan. 25th, 2006 04:51 pm (UTC)
There's an article about planet hunting in the October issue of Discover. In fact, it's a really interesting 25th Anniversary Issue - chuck full of fascinating stuff.

The only thing I'm perplexed about is this theory that the earth was impacted 4 billion years ago - causing everything to melt and the heavier metals to fall into the center - this is theorized as the reason we have a magnetic field (which Venus, Mars and the Moon do not have). This protects us from lethal cosmic rays. So even if they find a planet the right size and the right distance from the sun, wouldn't also have to have a similar geologic history? Cause how could there be life without a magnetic field???
silverdee
Jan. 27th, 2006 04:40 pm (UTC)
Sorry I am so slow in responding to this. I didn't know that about the magnetic field and the protection it provides us puny Earth dwellers. You have asked a very good question. I wish I knew more about all this. I find it endlessly fascinating, too!
( 2 comments — Leave a comment )

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