The universe (2)

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 3. The planet we live on (5)
  2. 4. A ___ in the spectra of very distant galaxies toward longer wavelengths (8)
  3. 9. Energy that travels in waves or particles (9)
  4. 10. Natural satellite that orbits the Earth (4)
  5. 11. Any of numerous small celestial bodies composed of rock and metal that move around the sun (8)
  6. 13. The organ of sight (plural) (6)
  7. 14. Having the sun as the center (12)
  8. 15. A relatively small extraterrestrial body consisting of a frozen mass that travels around the sun (5)
  9. 16. A medicinal liquid preparation intended for use in an atomizer (6)

Down

  1. 1. Any of the four outermost planets in the solar system (8)
  2. 2. The tendency of a body to maintain its state of rest or uniform motion unless acted upon by (7)
  3. 5. The sun with the celestial bodies that revolve around it in its gravitational field (11)
  4. 6. A region of space resulting from the collapse of a star (9)
  5. 7. The use of movements to communicate familiar or prearranged signals (6)
  6. 8. To extend in one or more directions (9)
  7. 12. A star that explodes and becomes extremely luminous in the process (9)