Across
- 2. is a sphere of hot gases that gives off light and heat
- 4. is a huge cloud of gases and dust
- 9. is a small and very dense star that shines with a cooler white light
- 10. analyzing data of the star's brightness for changes that indicated that a planet passed in front of the star
- 11. as the expanding hydrogen moves farther from the center of the star, it cools and turns red
Down
- 1. constellations that never appear to rise or set
- 3. star patterns in the sky
- 5. is the distance light travels in one year
- 6. the exploding star
- 7. is an object that is so dense and has such powerful gravity that nothing can escape from it, not even light
- 8. beginning star