| Astronomical time period |
| Canyon phenomenon |
| Coastal phenomenon |
| Astronomical time periods |
| Pre-migraine headache phenomenon |
| Agricultural phenomenon sometimes linked to UFOs |
| Autumn lunar phenomenon |
| Astronomical altar |
| Alpine phenomenon |
| Phenomenon observed in receding galaxies ... and in the answers to this puzzle's asterisked clues? |
| Annual publication giving dates of astronomical and other events |
| Astronomical periods |
| Astronomical difference |
| Pop culture phenomenon |
| Astronomical rarity |
| Stock market phenomenon |
| Astronomical flare-ups |
| First light ... or a phenomenon suggested by this puzzle's seven sets of circled letters? |
| Altair or Sirius, astronomically speaking |
| Eerie phenomenon |
| Depression phenomenon |
| Acoustic phenomenon |
| Astronomical and lunar |
| Astronomical red giant |
| Eclipse phenomenon. |
| Astronomical figures |
| Polar region phenomenon |
| Astronomical surveyors' readings |
| Phenomenon of the Colorado River. |
| Astronomical data providers |