Astronomical Terms Used in : All Categories
| Reinmuth, Karl + | Karl Reinmuth: A Lifetime Dedicated to … | Astronomers |
| Repetition + | The Power of Repetition: Borda's Method… | Galactic Astronomy |
| Reticulated Micrometer + | The Reticulated Micrometer: A Classic T… | Galactic Astronomy |
| Reticulum (the Reticle) + | The Reticulum: A Net of Stars in the So… | Constellations |
| Retrograde Motion + | When Planets Go Backwards: Understandin… | Galactic Astronomy |
| Reversal + | Reversal: A Key to Precision in Stellar… | Galactic Astronomy |
| Revolution + | Understanding Revolution: A Dance of Ce… | Galactic Astronomy |
| Rhæticus, Georg Joachim + | Rhæticus: The Advocate for Copernicus … | Astronomers |
| Rhea + | Rhea: Saturn's Icy Moon Rhea, the fift… | Solar System Astr… |
| Riccioli, Giovanni Battista + | Giovanni Battista Riccioli: The Man Who… | Astronomers |
| Ridley, Harold Bytham + | A Sky Full of Stars: Harold Bytham Ridl… | Astronomers |
| Rigel + | Rigel: The Giant's Foot in the Sky Rig… | Stellar Astronomy |
| Right Ascension + | Charting the Stars: Understanding Right… | Galactic Astronomy |
| Rings of Saturn + | Saturn's Rings: A Marvelous Symphony of… | Solar System Astr… |
| Rising of Celestial Objects + | The Rise and Rise of Celestial Objects:… | Galactic Astronomy |
| Robinson, Romney + | The Sky Above and the Earth Below: The … | Astronomers |
| Rømer, Ole + | Ole Rømer: A Pioneer of Light and Time … | Astronomers |
| Ronan, Colin Alastair + | Ronan, Colin Alastair: A Pioneer of Ast… | Astronomers |
| Rosse, 3rd Earl of + | The Legacy of Lord Rosse: From Ireland … | Astronomers |
| Rosse, 4th Earl of + | The Legacy of the Stars: William Parso… | Astronomers |
Most Viewed
- Alpha Centauri The closest star sy… Stellar Astronomy
- Astronomical Light Curves Graphs showing the… Galactic Astronomy
- Andromeda Galaxy A spiral galaxy loc… Galactic Astronomy
- Altair A name applied to t… Stellar Astronomy
- Alshain A name sometimes ap… Stellar Astronomy
