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a team of planet hunters led by

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astronomers at the University of

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California in Santa Cruz and the

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Carnegie Institution of Washington has

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announced the discovery of a planet

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orbiting a nearby star Gliese 581 at a

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distance that places it squarely in the

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middle of the star's habitable zone this

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would be the most earthlike exoplanet

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and the first truly habitable one yet

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discovered the research was supported by

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grants from NASA and the National

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Science Foundation images show planetary

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orbits of the Gliese 581 system compared

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to those of our own solar system the

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Gliese 581 star has about 30 percent the

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mass of our Sun and the outermost planet

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is closer to its star than we are to the

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Sun the fourth planet G is a planet that

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could sustain life the Goldilocks zone

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is the range of orbits around any star

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where it's neither too hot nor too cold

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but just right for liquid water to exist

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on the surface and that's a key

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ingredient for the existence of life pls

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a 581 G has an orbit of just about 37

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days around the around the star when you

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listen to that you think wow that must

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be way too close to the star to further

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to be life because that's pretty darn

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that's that's a short orbit so this is

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shorter than the orbit of mercury around

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our own Sun must be terribly hot

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actually that's not the case because

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Gliese 581 like I said a red dwarf star

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much cooler than our Sun emits much less

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radiation so in fact those planets need

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to snuggle up a lot closer to that star

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in order to get the warmth so in fact

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the habitable zone around Gliese 581 is

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much closer to the star than in our own

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solar system we don't know if it's a

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rocky planet in fact that Center we

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haven't determined the density because

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you need yet another measurement

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however if everything's fit or remains

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I suspect that the affected temperature

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of this determined because of the

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dynamics right because of the orbit and

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how our heart is the central star the

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temperature for this or the fact the

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temperature of this on the surface is up

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if it were Rocky allow for water to

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remain such and so we we have hope that