Atom & Cosmos

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OLDER THAN IT LOOKS  Some very old stars in the Milky Way, such as HE 0107-5240 (arrow), might be first-generation stars in disguise, a new study suggests.

Ceres map

COVERED WITH CROPS  This false-color map of Ceres obtained by the Dawn spacecraft highlights the dwarf planet’s newly named features and its changing mineral composition. Red marks places that strongly reflect infrared light whereas blue regions reflect shorter wavelengths.

Salt deposits on Mars

Salts deposited in dark streaks on Mars, such as these in the nearly 1000-kilometer-long canyon Coprates Chasma, are left behind by contemporary seasonal water flows, a new study suggests.

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