PLANETX
| Date | Clue |
|---|---|
| 2020-08-20 | Hypothetical solar system body beyond Neptune |
| 2018-11-14 | Hypothetical body in the solar system beyond Neptune |
| Date | Clue |
|---|---|
| 2020-08-20 | Hypothetical solar system body beyond Neptune |
| 2018-11-14 | Hypothetical body in the solar system beyond Neptune |