| METEORSHOWER | Celestial event caused when the Earth passes through the path of a comet, displaying space debris as streaks of light (6,6) |
| ARC | Path of a comet |
| HEARTACHES | Anguish caused when the rash ace crashed (10) |
| THEAMERICANREVOLUTION | Historical event caused in part by the 1765 Stamp Act |
| SUNSPOT | Solar event caused by magnetic activity |
| CLEARANCESALES | Cancels a lease, sadly holding first of regular events caused by shops closing down (9,5) |
| CHAINREACTION | Series of events caused by a car on thin ice crashing (5,8) |
| RIPPLEEFFECT | Series of events caused by a single action |
| LEONID | A meteor of a swarm peaking in November caused by Earth crossing the path of a dust trail left behind by comet Tempel-Tuttle (6) |
| ORBIT | Term for the path of a body revolving around an attracting centre of mass, as a planet around the Sun or a satellite around a planet (5) |
| LUNAR | The moon takes on an ominous red shade when it passes through the Earth's shadow in a total ... ecli |
| DIAMETER | A straight line that passes through the centre of a circle with its endpoints on the perimeter (8) |
| COMA | Nebulous envelope surrounding the nucleus of a comet; or, a group of bracts crowning a pineapple (4) |
| NUCLEUS | Meaning "little nut", a kernel; the solid centre of a comet's head; or, the dense core of an atom (7) |
| LEONIDS | Meteor shower peaking annually around November 17-18, caused by Earth crossing the path of a dust trail left behind by the comet Tempel-Tuttle (7) |
| TRACK | A microgroove in a vinyl record or LP; a railway line; or, the path of a particle in a bubble chamber (5) |
| APOGEE | In astronomy, the point furthest from Earth in the path of a body orbiting the planet (6) |
| BRIDAL | Said to be the path of a lady on the day of the union (6) |
| ECT | The administration of a strong electric current that passes through the brain to induce convulsions |
| LONGITUDE | An imaginary circle on the earth's surface which passes through the poles at right angles to the equator (9) |
