AURORAS
| Date | Clue |
|---|---|
| 2016-07-24 | Arctic lights |
| 2016-04-12 | Night lights |
| 2015-02-14 | Free light shows |
| 2013-03-03 | Night lights |
| 2011-12-06 | Northern and southern lights |
| 2009-09-02 | Night lights |
| 2008-05-25 | Night lights |
| 1997-12-21 | Meteorological effects |
| 1996-05-18 | Outdoor light shows |
| 1996-03-22 | Dawns |