The new science fiction blockbuster "Avatar" is set on habitable and inhabited moon Pandora, which orbits the fictional gas giant Polyphemus in the real Alpha Centauri system.
Although life-bearing moons like Pandora or the Star Wars forest moon of Endor are staples of science fiction, astronomers have yet to discover any moons beyond our solar system. However, they could be science fact, and researchers might soon not only be able to spot them, but also scan their atmospheres for key signs of life as we know it, such as oxygen and water.
"If Pandora existed, we potentially could detect it and study its atmosphere in the next decade," said astrophysicist Lisa Kaltenegger of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Mass.
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