Across
- 3. our sun is 4.5 --- years old
- 5. the end of a giant star
- 7. the process by which stars make their energy
- 9. the fuel for a star
- 11. the end of our sun in 5 billion years
- 12. the star always seen in the north
- 13. colour of the coolest stars
Down
- 1. a giant star lives only to be about 1 --- years old
- 2. the cloud of gas and dust in which stars are born
- 4. the end of a large star
- 6. the outward explosion of a large or giant star
- 8. colour of the hottest stars
- 10. the colour of our sun
- 11. Sirius is this colour