Astronomy History

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Across
  1. 2. The Milky Way is one of these and contains billions of stars.
  2. 5. Basic building block of all matter.
  3. 7. any substance the has mass or takes up space.
  4. 8. The most recognized astronomical objects.
  5. 9. The beginning of the universe.
  6. 11. Any planet beyond our solar system.
  7. 14. designed plans for a flying machine.
  8. 15. Developed the telescope and wrote a book.
  9. 16. Greek Mythology flew too close to the sun.
  10. 17. The study of everyting outside Earth's atmosphere.
  11. 18. not changing or moving
  12. 19. Discovered galaxies outside of the Milky Way.
Down
  1. 1. It exist in space but it cannot be seen like planets and stars.
  2. 3. The force or energy in the universe that keeps it expanding.
  3. 4. Einstein hypothesized the universe is not static due to forces in the universe pushing back against gravity.
  4. 6. National Aeronautics and Space Administration
  5. 8. proton, electrons, and neutrons
  6. 10. The study of motion, matter and energy.
  7. 12. Theorized the Sun was the ccenter of the universe.
  8. 13. It's like the sun being shrunk to the size of Lexington and the gravity is so strong that not even light can escape.