| HALEBOPP | Visible to the naked eye for some 18 months, a comet that last reached its closest approach to Earth in 1997 (4-4) |
| ICARUS | Asteroid with the closest approach to the sun |
| AMIS | Poet and comic novelist Kingsley who was married to Elizabeth Jane Howard for some 18 years (4) |
| THEEARTHANDMARS | Bodies making their closest approach in more than 50,000 years on August 27, 2003 |
| STAR | Any one of- the 9,096 astral objects visible to the naked eye, particularly on a dark night or in any of the International Dark Sky Reserves (4) |
| HALLEYS | Comet visible to the naked eye - it's due to reappear in 2061 (6'1) |
| NEPTUNE | The only planet in our solar system that is never visible to the naked eye (7) |
| URANUS | Seventh planet from the sun some; times visible to the naked eye (6) |
| ANDROMEDA | Constellation in the northern sky containing a spiral galaxy visible to the naked eye |
| MACROSCOPIC | A comic corps parading round, visible to the naked eye (11) |
| HALLEYSCOMET | Heavenly body last visible to the naked eye in 1986 * (12) |
| COMET | Streaker that may be visible to the naked eye |
| WALPOLE | Imprisoned in the Tower of London for some six months, a Kit-Cat Club member regarded as Britain's first prime minister, for whom Houghton Hall was built in the 1700s and whose son coined "serendipity |
| ANDROMEDAGALAXY | Spiral collection of star systems visible to the naked eye (9,6) |
| ANDROMEDANEBULA | Spiral galaxy visible to the naked eye (9,6) |
| MARS | Planet periodically visible to the naked eye |
| GEMINI | Like stars visible to the naked eye |
| EDMOND | Forename of the astronomer who used Newton's laws of motion to predict the return of the comet that was later named in his honour (6) |
| TELESCOPIC | In a supermarket the French film is invisible to the naked eye (10) |
| SACRAMENTO | City which was the western terminus of the Pony Express during its 18 months in operation (10) |
