Atom & Cosmos

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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.

photo illustration of satellite galaxies

Seventeen dwarf galaxies (some marked above with red dots) have been found around the Milky Way this year, including eight recently announced. These satellites are often too faint for images, so astronomers use maps of star density (inset) instead.

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