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Super-Earth Discovered in Star's Habitable Zone


Craig

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http://news.discovery.com/space/habitable-zone-exoplanet-super-earth-121107.html

The family of planets circling a relatively close dwarf star has grown to six, including a potential rocky world at least seven times more massive than Earth that is properly located for liquid water to exist on its surface, a condition believed to be necessary for life.

Scientists added three new planets to three discovered in 2008 orbiting an orange star called HD 40307, which is roughly three-quarters as massive as the sun and located about 42 light-years away in the constellation Pictor.

Of particular interest is the outermost planet, which is believed to fly around its parent star over 320 days, a distance that places it within HD 40307's so-called "habitable zone."

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Guest Rooster

It's not all about the so called "goldilocks zone" though... To survive a planet also needs an iron core too - although this is never mentioned!

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