Astronomy Cross Word

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