| Answer | Crossword Clue |
|---|---|
| PLANETX | Hypothetical body in the solar system beyond Neptune |
| PLANETX | Hypothetical solar system body beyond Neptune |
| OUTERMOST | Like Neptune among the planets in the solar system |
| CERES | Body in our solar system that was considered a planet in the first half of the 19th century |
| meteoroids | A small body moving in the solar system that would become a meteor if it entered the earth's atmosphere |
| meteoroid | A small body moving in the solar system that would become a meteor if it entered the earth's atmosphere |
