Atom & Cosmos

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New Horizons will buzz a boulder in the Kuiper belt, seen in this artist’s illustration, on January 1, 2019.

craters on Ceres

Two eroded craters on Ceres, each about 130 kilometers across, dominate the terrain in a new picture from the Dawn spacecraft.

Dione and Saturn's rings, as photographed by Cassini

FINAL APPROACH The Cassini spacecraft took this picture of Dione, with Saturn’s rings in the background, as it sped toward the moon for the last time.

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