UMBRA
| Date | Clue |
|---|---|
| 2026-04-09 | Shadow |
| 2023-12-24 | Shadow |
| 2022-06-22 | Darkest part of a shadow |
| 2020-12-06 | Shadow during an eclipse |
| 2020-01-18 | Shaded area |
| 2017-05-29 | Darkest part of a shadow |
| 2016-10-06 | Shadow |
| 2010-12-26 | Planetary shadow |
| 2009-10-22 | Shadow |
| 2009-04-26 | Shadow |
| 2008-01-31 | Planetary shadow |
| 2007-01-01 | Shadow |
| 2004-12-18 | Shadow |
| 2004-10-31 | Spectral image |
| 2004-07-18 | Dark area |
| 2003-10-31 | Shadow |
| 2002-09-25 | Shadow |
| 2002-03-12 | Planetary shadow |
| 1999-11-21 | Planetary shadow |
| 1997-02-09 | Dark area |
| 1997-01-31 | Eclipse feature |
| 1996-05-09 | Shadow |
| 1995-09-07 | Shade |
| 1994-07-05 | Eclipse shadow |