Vesta Covered In Hydrogen, NASA's 'Dawn' Asteroid Probe Reveals

Vesta Covered In Hydrogen, NASA's 'Dawn' Asteroid Probe Reveals: "The protoplanet Vesta, a large space rock in the solar system's asteroid belt, is covered with a surprising amount of hydrogen, and bits of Vesta may have rained down on Earth in the form of meteorites, NASA's Dawn probe has revealed.

Dawn spent more than a year orbiting Vesta, a behemoth 330-mile-wide (530 kilometers) asteroid that circles the sun between the orbits of Mars and Jupiter. Earlier this month, on Sept. 5, Dawn took its leave of Vesta to begin trekking to the even-larger space rock Ceres, which is categorized as a dwarf planet."

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