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Illustration: Planet and moon cross in front of star.

插图：地球和月球在恒星前方交叉。

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The planet is so close to the star that one side is probably locked facing the star, the same way the moon always shows the same face to the Earth.

该行星靠恒星如此之近，很可能它有一面是永远面对着恒星的，正如月球永远只以一面面对地球。

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But in constructing the first atmospheric model that has the orbital dynamics of a star-planet-moon system fully included, astronomers Duncan Forgan, at the Royal Observatory in Edinburgh, and David Kipping, at the Harvard Smithsonian Center for Astrophysics in Cambridge, turn that idea on its head.

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Kepler-37b is a tad larger than our heavenly dance partner, the Moon, and whizzes round a star much like our Sun, with two larger planets in its system for company.

ENGADGET: NASA's Kepler telescope spies smallest planet to date, no aliens

Stewart's co-star Robert Pattinson doesn't make our list because he is over 21, but New Moon's Taylor Lautner does.

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