Across
- 3. The pattern of wavelengths found in light from an object
- 6. A tool used to observe distant objects in space
- 9. The distance light travels in one year
- 13. Patterns of light scientists study to learn about stars and other objects in space
- 14. The central region of a star where nuclear fusion occurs
- 15. Energy that travels through space as waves or particles
- 17. Everything that exists, including all matter, energy, space, stars, and galaxies
Down
- 1. The scientific theory describing the beginning and expansion of the universe
- 2. A large glowing ball of hot gas that produces its own energy
- 4. The star at the center of our solar system
- 5. The galaxy that contains our solar system
- 7. The planet we live on
- 8. The Sun and all the objects that orbit around it
- 10. The range of colors or wavelengths produced when light is separated
- 11. A huge group of stars, gas, and dust held together by gravity
- 12. The force that attracts objects with mass toward one another
- 16. The path one object follows around another object in space