... Tonight's Sky . ... solar system . ... space flight . ... A look into Vesta's interior . Scientists discover a cosmic chunk in space that originated from deep inside the third-largest asteroid. ... Since some meteorites that were found on Earth consist of similar rock as that of Vesta's mantle, scientists believe that this collision also hurled material from deep within the asteroid into space. ... The scientists now hope for more information about Vesta's structure from NASA's Dawn mission. ...