Across
- 3. a large cluster of stars
- 5. consists of many galaxies separated by empty space
- 8. the centre of our solar system
- 9. an object that orbits a star but too small to be classed as a planet
Down
- 1. system consists of a central star orbited by planets
- 2. a natural satellites, a lump of matter that orbits a planet
- 4. orbiting object that is smaller than a dwarf planet.
- 6. a planet that exists around another star outwith our solar system.
- 7. large ball of matter that orbits a star, does not emit light
- 8. large ball of matter undergoing nuclear fusion