Universe and Stars

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