This is Vesta, nearly 300 miles across and made up of the primordial building blocks of our solar system. Until Dawn approached this large asteroid, it was just a blurry rocky body imaged by the Hubble Space Telescope. Throughout its time in orbit around Vesta, Dawn discovered that this asteroid actually resembled more of a baby planet, giving scientists hints about what proto-planets really look like. “Vesta is a time capsule of the very early days of solar system formation, “ says Raymond. After gathering data directly from orbit, the team can now trace the evolution of Vesta through modeling and what they found is Vesta likely formed within 1.5 million years of our solar system. That means that the first pebbles that existed around our star helped make the asteroid. As far as space rocks go, they don’t really get much older than Vesta.