After 11 years, NASA's asteroid-hopping spacecraft is running out of fuel

An artist’s impression of Dawn between Ceres and Vesta.

An ion propulsion system.

The first image of Vesta taken by Dawn after achieving orbit.

A map of dark materials found on Vesta.

A false-color image showing Ceres, as seen by the Dawn spacecraft.

Inside Occator crater on Ceres.

Ceres’ lonely mountain, a probable cryovolcano.

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