I just heard this term again on the new science fiction miniseries from Britain called 'Outcasts' about a group of people surviving on a new planet after leaving Earth which has become uninhabitable. It's a very interesting show staring Jamie Bamber of 'Battlestar Galactica' fame.
Twice last week and now this week I have been reading alot about planets being discovered in our galaxy that are within this 'Goldilocks Zone'. That means that they are not too far from a sun and not too close to a sun. They are perfect (like the bear's porridge) to support life. I like that term and how it represents a scientific phenomenon that is perfectly understandable even to young students.
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Then you throw in the size of the planet (tectonics, gravity, atmosphere density), the presents of oxygen, nitrogen, hydrogen (water) and carbon molecules (for earthtype [ie us] lifeforms) add in the spectral type of the star (radiation emission type [colour]) and then figure the stars stability (is its fluctuations in radiation too large to support long term presents of life) and many more give rise to our present circumstances (existence). To find this in one system (that we know) among billions just sucks, and is plain boring.
Well aren't you a happy optimist.
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