Across
- 2. A collection of billions of stars.
- 7. These exploding stars produce all the elements heavier than iron.
- 8. Our galaxy, the Milky Way, is this type of galaxy.
- 9. A star that is cool, but bright and dying and has swelled up.
- 12. For these stars, the hotter they are the brighter they are.
- 14. Our sun is this type of star.
- 15. The process that creates a star's heat and light.
Down
- 1. The distance light travels in a year; used to measure the width of galaxies and the distances between galaxies.
- 3. These produce all the light and heat in space.
- 4. This diagram show the relationship between brightness and temperature for stars.
- 5. A star that is hot, but dim and at the end of its life.
- 6. Very large, hot and rare stars.
- 10. Supernovas produce these very dense collapsed stars.
- 11. Clouds of gas and dust where stars are born.
- 13. All stars contain this gas.