| Answer | Crossword Clue |
|---|---|
| CERES | First observed asteroid |
| CERES | First asteroid |
| CERES | First known asteroid |
| CERES | First discovered asteroid |
| CERES | First asteroid discovered. |
| CERES | First asteroid discovered |
| CERES | First-discovered asteroid |
| CERES | First asteroid ever discovered |
| EROS | Asteroid first seen in 1898 |
| CERES | Asteroid first sighted in 1801 |
| EROS | First asteroid landed on by a spacecraft |
| EROS | First asteroid orbited by a NASA spacecraft |
| EROS | First near-Earth asteroid to be discovered |
| EROS | First asteroid landed on by a NASA craft |
| EROS | First asteroid to be landed on by a spacecraft |
| EROS | First asteroid to be orbited by an artificial satellite |
