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[QUOTE]Originally posted by Sol System: [QB] That link won't work now that it's tomorrow, by the way. Anyway, this is an argument that has been around for a long, long time. The problem is that we still don't know what constitutes average for a planetary system. If we judged it on simple statistics, the average planet would be huge, hot, and very, very close to its star. (Forgetting for a moment that current detection methods only allow us to see the really odd planets.) At any rate, Frank, the points the article brings up are sound. For life similar to our own, at least, you need to be at the right distance from the sun, and you need a big moon. Why? Tides. Without them, the oceans would be one big stagnant pool. Yucky. Though, of course, we can't say that such a planet couldn't have life, as there's plenty of life in big stagnant pools right here on Earth. Also, of the five planets that we can call terrestrial, two of them have large moons. (Earth and Pluto, to be precise.) Again, we need more data! So, uh, everybody grab a telescope. [IMG]http://flare.solareclipse.net/smile.gif[/IMG] Also, Mercury can only be considered cold if daily highs of 800 degrees celsius require a coat and mittens. Of course, with no atmosphere, it gets down to several hundred below at night. So it depends on when you go. [/QB][/QUOTE]
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