| GALAXY | System of gravitationally-bound stars, dark matter and cosmic dust, such as the Milky Way, Andromeda or the Large Magellanic Cloud (6) |
| CLUSTER | Group of gravitationally bound stars or galaxies that appear close together to an observer (7) |
| EUCLID | Space telescope launched by the European Space Agency in July 2023 to study dark matter and dark energy (6) |
| ASH | Cinereal dust, such as that found inside a famous cricket trophy; or, said powder's silvery-grey colour (3) |
| GALAXIES | Milky Way, Andromeda, etc. |
| ALVIN | All-Star Dark of the 1950s Giants |
| MAAT | Egyptian goddess of truth, justice and cosmic balance; daughter of the sun god Ra and counterpart or wife of Thoth (4) |
| KARMA | Eastern doctrine of destiny and cosmic justice (5) |
| ATMOSPHERE | Blanket of gravitationally-bound life-sustaining gases comprising a series of layers surrounding Earth (10) |
| SYSTEM | Set of gravitationally bound planets orbiting a star; scheme of classification; or, methodicalness (6) |
| STARSYSTEM | An asterism, constellation, galaxy or other group of gravitationally bound stellar celestial bodies (4,6) |
| NEBULA | Lemon slice, butterfly, lagoon, cat's eye, rosette a cloud of interstellar cosmic dust and gas such as M16 with the Pillars of Creation at its centre (6) |
| COSMIC | ____ web, a network of filaments of dark matter that may form the basis of the universe (6) |
| DUST | Form of dark matter that is integral to the plot of Philip Pullman's His Dark Materials trilogy of novels |
| PHYSICS | That branch of science concerned with the study of the properties of space, time, matter and energy (7) |
| STARS | Gravitationally-bound gaseous spheres classified under the Morgan-Keenan system (5) |
| ORBIT | Elliptical path of a gravitationally bound celestial object on its regular course around a planet or star (5) |
| PLASMA | 'Fourth' state of matter, and the most abundant in the universe; comprising approximately equal numbers of superheated ions and electrons (6) |
| MARKET | Formation of timeless dark matter, eg on new area of productive land (6,6) |
| GARDEN | Formation of timeless dark matter, eg on new area of productive land (6,6) |
