Planetary Science

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solar wind simulation

THINNING OUT  The solar wind (beige streaks) rips molecules from Mars’ atmosphere. Orange lines represent high energies of out­going ions, blue low.

Phobos in 1977

DOOMED MOON Stickney crater (left) on Phobos, seen in this 1977 image from Viking 1, helped researchers predict that the moon will crumble into a ring around the Red Planet.

FAR OUT  The newly discovered V774104 is the most distant object in the solar system and beats the previous record holders, the dwarf planet Eris and its moon Dysnomia (illustrated).

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