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The star system harboring the new planet contains only one star, as do the other three systems with extrasolar planets analyzed by Kane, an assistant professor of physics and astronomy, and his collea...
Astronomers confirm rocky nature of new exoplanet（图）
astronomers rocky nature new exoplanet
2009/9/21
Astronomers have obtained the best evidence yet that a planet orbiting a star 400 light years away from Earth is a solid, rocky world just like our own. The extrasolar planet (or exoplanet), known as ...