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