PASADENA, Calif., Sept. 27 (UPI) -- Enormous troughs on the asteroid Vesta suggest a core, mantle and crust, structure normally seen in larger bodies like planets and large moons, NASA reports.
Imaged by NASA's Dawn spacecraft, an extensive system of troughs encircles Vesta's equatorial region, with the biggest of them, called Divalia Fossa, bigger than the Grand Canyon, the space agency's Jet Propulsion Laboratory in Pasadena, Calif., reported Wednesday.