| 2026-08-25 | *8th |
| 2026-08-02 | God who aids the Trojan fleet in the first book of the "Aeneid" |
| 2025-08-19 | Only planet in the solar system not visible to the naked eye |
| 2023-07-18 | Trident-wielding god of the sea |
| 2022-05-01 | The eighth of eight |
| 2015-12-05 | Triton's locale |
| 2014-11-02 | Astronomical body after which element #93 is named |
| 2013-08-13 | Roman god of horses |
| 2010-01-01 | Great Dark Spot locale |
| 2007-11-02 | It was first observed in 1846 |
| 2003-04-02 | Poseidon, to the Romans |
| 1999-10-23 | Great Dark Spot locale |
| 1998-03-21 | 1846 Johann Galle discovery |
| 1996-12-29 | Where Triton is |
| 1996-02-18 | The sea personified |
| 1995-05-10 | Trident carrier |
| 1994-05-12 | Voyager II subject |