| GALILEI | Last name in astronomy |
| FIREBALL | Bolide is its name in astronomy |
| STAR | A big name in astronomy? (4) |
| URSA | Major name in astronomy (4) |
| NEBULAE | In astronomy and in the plural, what are dark patches in the sky consisting of interstellar gases an |
| EPOCH | Moment in time, in astronomy |
| VARIABLE | In astronomy, changing in brightness (8) |
| PARALLAX | Difference in apparent direction, in astronomy |
| YLEM | In the Big Bang theory in astronomy, the primordial matter of the universe (4) |
| GUESSEDSTAR | Took a shot in the dark in astronomy class? |
| DREAMY | Lovely old mates of Brian Cox last in astronomy (6) |
| RADIANT | In astronomy, the apparent point in the night sky from which a meteor shower appears to emanate (7) |
| TRANSIT | In astronomy, the passage of a celestial body across an observer's meridian, used in timekeeping (7) |
| UMBRA | Darker part of a shadow, especially in astronomy for the shadow cast by the moon or Earth in an eclipse (5) |
| APOGEE | In astronomy, the point furthest from Earth in the path of a body orbiting the planet (6) |
| EON | 365 billion days, in astronomy |
| ALPHAS | Brightest stars, in astronomy |
| HELIACAL | Near the sun, in astronomy |
| ALBEDO | Reflection ratio. in astronomy |
| EPICYCLES | Inner circles, in astronomy models |
