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"The fundamental question is: Are we alone? For the first time, there's an optimism that sometime in our lifetimes we're going to get to the bottom of that," said Simon "Pete" Worden, an astronomer who heads NASA's Ames Research Center. "If I were a betting man, which I am, I would bet we're not alone - there is a lot of life."
Read more: www.sfgate.com...;type%3Dscience#ixzz0danXIFwr
Originally posted by Phage
The article is about finding "Earth-like planets", not about finding life. By "Earth-like" they mean about the right size and about the right distance from its star. We have no way of determining any of the other factors which require it to be truly like Earth.
Originally posted by waveguide3
The existance of Homo Sapiens on Earth is down to shear accident. Had the dinosaurs not been wiped out by a great comet impact (or whatever it was), we would not exist. Had that extinction not happened, the Earth would be dominated by something else, certainly not human. They would to us, be alien.
This is why the anthropomophisation of aliens that supposedly visit Earth is simply laughable.
WG3
[edit on 25-1-2010 by waveguide3]
Originally posted by Phage
reply to post by fieryjaguarpaw
It's news to me.
I can't imagine how this could be done, much less what assumptions would have to be made about what the signatures of extraterrestrial life would consist of.
The Goldilocks Principle states that something must fall within certain margins, as opposed to reaching extremes. It is used, for example, in the Rare Earth hypothesis to state that a planet must neither be too far away from, nor too close to, the sun to support life
The challenge now is to find terrestrial planets (i.e., those one half to twice the size of the Earth), especially those in the habitable zone of their stars where liquid water and possibly life might exist.