| Astronomical time period |
| Astronomical time periods |
| Singles-bar rarity |
| Rush hour rarity |
| Baseball rarity |
| Hades rarity, it's said |
| Astronomical altar |
| Annual publication giving dates of astronomical and other events |
| Astronomical periods |
| Altair or Sirius, astronomically speaking |
| Astronomical difference |
| Astronomical rarity |
| Astronomical flare-ups |
| Airline rarity, nowadays |
| A rarity in the U. S. Army. |
| Astronomical data providers |
| Astronomical figures |
| Astronomical red giant |
| Astronomical and lunar |
| Astronomical surveyors' readings |
| Calendar rarity |
| Alcatraz rarity |
| Astronomical |
| Medical rarity nowadays |
| Astronomical examination? |
| Astronomical figure? |
| Astronomical unit |
| Calculate without astronomical observations |
| Rainy-day rarity |
| Black ___ (very dense astronomical object) |