Big Bang Theory, Heliocentric, and Geocentric

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Across
  1. 6. There are _________ of galaxies in the universe.
  2. 9. Who was put on house arrest by the church because he believed in the Heliocentric model?
  3. 10. Copernicus and Galileo believed in the __________ model of the solar system.
  4. 13. Aristotle and Ptolemy believed in the _________ model of the solar system.
  5. 15. He developed an early uniform circular model of motion.
  6. 17. What theory is the most accepted universe formation theory?
  7. 18. He advanced the theory that the Earth and other planets revolve around the Sun.
Down
  1. 1. He agreed with Aristotle and added mathematics to prove his theory.
  2. 2. this is an explanation or model backed by results from many tests.
  3. 3. The Big Bang happened between ten and ___________ billion years ago. (HINT: spell out the number)
  4. 4. Astronomers say that the galaxies and stars are still moving ________ from each other.
  5. 5. In Greek, _______ means Sun.
  6. 7. He is thought of as the founder of modern science.
  7. 8. The space between galaxies is ________.
  8. 11. What analogy do astronomers use to demonstrate the expanding universe?
  9. 12. The universe includes living things, planets,stars, galaxies, dust clouds,light and even ________.
  10. 13. In Greek, ______ means Earth.
  11. 14. What famous astronomer announced that galaxies are moving away from each other in 1929?
  12. 16. Galileo observed which planet that went through phases?