Aliens

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Via: Nature
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Astronomers have found the first Earth-sized exoplanet within a star's habitable zone. The planet is the closest thing yet to the coveted 'Goldilocks' orb that scientists have long sought — a world roughly the size of Earth orbiting a star at a distance that is just right for liquid water to exist.

"We definitely think it's one step closer to finding a true Sun–Earth analogue," says study co-author Elisa Quintana, an astronomer at the SETI Institute in Mountain View, California, and at the nearby NASA Ames Research Center in Moffett Field. But because the star that the exoplanet orbits is a cool, dim one unlike the Sun, Quintana and her colleagues consider the planet more of a cousin to Earth than a twin.

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How does living in an endless ocean sound? For some, a perpetual sea-side view may be a dream come true. And that dream may already be a reality for extraterrestrial life, according to a new study which suggests that watery exoplanets tilted on their axis in just the right way would boast a "rather mild" and habitable climate.

Experts have been searching for planets outside or solar system that could support life for a long time now. Nearly 2,000 exoplanets beyond our solar system have been identified to date, and NASA experts and their colleagues recently affirmed their belief that a stunning 10 to 20 percent of all the stars in the sky may host habitable planets.
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