Astronomy Exam Review Crossword!

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Across
  1. 4. latin for cloud. Filled with gas and dust in space
  2. 5. A very dense area so strong that nothing can escape, not even light.
  3. 6. Determined all objects in the universe attract each other through gravitational force
  4. 7. Came up with three planetary laws of motion that are still used today. Assistant to Brahe
  5. 8. The science of the universe
  6. 9. scientists who study the universe
  7. 12. A person who studies astronomy.
  8. 14. One of the first people to use a telescope to observe space. Discovered craters on the moon and four of Jupiter's moons.
  9. 17. Imaginary shapes or outlines of mythological creatures, people/gods, and/or animals.
  10. 18. An optical instrument designed to make distant objects appear nearer.
  11. 20. a telescope that uses lenses to enlarge an image
  12. 23. The time it takes for the Earth to revolve around the Sun
  13. 25. The distance light travels in one year
  14. 27. Credited for recording very precise observations of planets and stars that helped future astronomers
  15. 29. The brightness and/or strength of a star
  16. 30. The time it takes for the Earth to spin once on its axis
Down
  1. 1. Used the sky to plant crops, harvest crops, change of seasons, etc...from the sky
  2. 2. Responsible for proving that other galaxies existed beyond of Milky Way
  3. 3. Believed the Sun was the center of the universe
  4. 10. Hot spheres of gas and dust in space of all different magnitudes
  5. 11. the phenomenon that causes heat and pressure to increase inside a cooling nebula
  6. 13. Our galaxy
  7. 15. the biggest type of galaxy with a lot of "stuff" in the middle and are shaped like a football
  8. 16. To spin on an axis
  9. 19. Believed the Earth was the center of the universe
  10. 21. a telescope that uses mirrors to enlarge an image
  11. 22. a galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms.
  12. 24. a galaxy with no defined shape
  13. 26. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
  14. 28. To move in a circular orbit around
  15. 29. The time it takes for the moon to revolve around the Earth