Goldilocks Planet

December 6, 2011 by staff 

Goldilocks Planet, A newly discovered planet is eerily similar to Earth and is sitting outside Earth’s solar system in what seems to be the ideal place for life, except for one hitch. It is a bit too big.
The planet is smack in the middle of what astronomers call the Goldilocks zone, that hard to find place that is not too hot, not too cold, where water, which is essential for life, does not freeze or boil. And it has a shopping mall-like surface temperature of near 72 degrees, scientists say.

The planet’s confirmation was announced Monday by NASA along with other discoveries by its Kepler telescope, which was launched on a planet-hunting mission in 2009.

That is the first planet confirmed in the habitable zone for Kepler, which already had found Earth-like rocky planets elsewhere. Twice before astronomers have announced a planet found in that zone, but neither has been as promising.

“This is a phenomenal discovery in the course of human history,” Geoff Marcy of University of California, Berkeley, one of the pioneers of planet-hunting outside Earth’s solar system, said in an email. “This discovery shows that we Homo sapiens are straining our reach into the universe to find planets that remind us of home. We are almost there.”

The new planet, named Kepler-22b, has key aspects it shares with Earth. It circles a star that could be the twin of Earth’s sun and at just about the same distance. The planet’s year of 290 days is even close to Earth’s. It probably has water and rock.

The only trouble is the planet’s a bit big for life to exist on the surface. The planet is about 2.4 times the size of Earth. It could be more like the gas-and-liquid Neptune with only a rocky core and mostly ocean.

“It’s so exciting to imagine the possibilities,” said Natalie Batalha, the Kepler deputy science chief.

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