Across
- 3. process in which heavy atomic nuclei split into smaller, lighter atomic nuclei.
- 6. Group of stars within a specific region.
- 7. Where stars are born.
Down
- 1. group of stars that appear to form a picture in the sky.
- 2. Idea that the Earth is at the centre of the universe.
- 4. Path that an object in space follows.
- 5. It is an apparent motion of nearby stars.
- 6. Ball of hot gas and plasma that gives off light.