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Artist's conception of two possible realizations of the newly-discovered small planet, Gliese 876 d. The planet's mass is about 7.5 times the mass of Earth, halfway between the mass of Earth and that of Uranus. The image in the upper left shows the planet as a giant but basically Earth-like, rocky planet, whereas the one at the lower right shows the planet as a gas/ices dominated miniature Uranus. Image courtesy of the National Science Foundation. + View Larger Image |
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Image courtesy of Trent Schindler and the National Science Foundation. + View Larger Image |