Across
- 3. Also called the habitable zone (10,4)
- 5. The whole of space and time (8)
- 6. Orbits a star (6)
- 8. Orbits around a star that's not the Sun (9)
- 10. Another energy emotted by a star (4)
- 11. Most important condition for life? (6,5)
Down
- 1. When Moon is between the Earth and Sun(5.7)
- 2. Collection of lots of stars (6)
- 4. Natural satellite of a planet (4)
- 6. Now a dwarf planet (5)
- 7. Proportion of reflected light (6)
- 9. Number of Earth from Sun (5)
- 11. Energy emitted by a star (5)
- 12. Distance between Sun and Earth (2)