Across
- 3. collects the light from distant stars and separates the light into bans of different colors
- 4. galaxies that have many different shapes and are smaller than other types of galaxies
- 6. the galaxy our solar system belongs to
- 7. galaxies that have a nucleus of bright stars and two or more spiral arms the wind outward from the center
- 12. receive radio waves emitted from objects in space
- 14. galaxies shaped like spherical or flattened disks, similar to a football shape
Down
- 1. uses mirrors to focus light rays
- 2. formed when celestial bodies such as planets and mars orbit around a star
- 5. theory that the universe expanded for a hot, initial condition at a specific point in time around 13 billion years ago
- 8. uses convex lenses to bend and focus lighting
- 9. existing matter and space considered as a whole
- 10. shift in light toward the red end of the visible light spectrum due to the wave lengths of light from galaxies being stretched as they move away from earth
- 11. a collection of stars, gases, dust, and planets, and other astronomical bodies held together by gravity
- 13. unit of measurement equal to the distance light travels in one year