Astronomy Cross Word Puzzle

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Across
  1. 3. All of space and everything in it.
  2. 7. A model of the solar system in which Earth and the other planets revolve around the sun.
  3. 8. The initial explosion that resulted in the formation and expansion of the universe.
  4. 9. The lowest possible temperature
  5. 13. A huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity.
  6. 14. Planets travel around the sun in what shape?
  7. 15. The study of the moon, stars, and other objects in space.
  8. 18. An object in space revolving around a star.
  9. 19. The apparent change in position of an object when seen from different places.
  10. 20. An enormously bright, distant galaxy with a giant black hole at its center.
  11. 21. When the Moon is more than half full.
  12. 22. Way Our galaxy
  13. 23. The star that provides light for the Earth
Down
  1. 1. A model of the universe in which Earth is at the center of the revolving planets and stars.
  2. 2. Matter that does not give off electromagnetic radiation
  3. 4. The tendency of an object to resist any change in its motion.
  4. 5. The observation that the farther away a galaxy is, the faster it is moving away.
  5. 6. One of the small asteroid-like bodies that formed the building blocks of the planets.
  6. 10. The movement of an object around another object.
  7. 11. When the moon’s shadow falls upon Earth.
  8. 12. The distance that light travels in one year
  9. 16. The spinning motion of a planet on its axis.
  10. 17. The force that pulls objects toward each other.
  11. 18. Change in the shape of the moon.
  12. 22. The most visible planet we see at night.