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