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Planetary Science

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TRAPPIST-1 planets

WATER WORLDS  The TRAPPIST-1 system, with seven Earth-sized planets orbiting a dwarf star, has captured the attention of scientists hunting for life outside the solar system. New estimates of the planets’ composition indicates that several are enveloped in water and ice.

moon craters

BRACE FOR IMPACT Artificial intelligence paints a portrait of the moon that’s even more pockmarked than previously thought.

Ceres crater

FOLLOW THE ICE  A wall of ice in the shadows of Ceres’ Juling crater, shown here in an image taken by NASA’s Dawn spacecraft, grew by about 50 percent over the course of six months.

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