| The protoplanet candidate orbits about 70 times further from its star than Earth does from the Sun. |
| This gaseous matter condensed into small particles that coalesced to form a protoplanet, which in turn grew by the gravitational attraction of more particulates. |
| Many scientists think it's a protoplanet left over from the solar system's first few million years. |
| In March, NASA's Dawn probe will arrive at protoplanet Ceres, the most massive body in the asteroid belt between Mars and Jupiter. |
| The mechanism generally invoked to solve this problem is a giant collision with an earth-sized protoplanet at the end of the planet formation. |
| It isn't clear how the latest suspected protoplanet is being formed. |
