LESSON 11

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Across
  1. 5. helps in the understanding of the size of the universe
  2. 7. the age of the universe
  3. 9. cmoes from the greek word wanderer
  4. 10. this theory proposed that there was no beginning to the universe nor there be an end
  5. 12. depends on on the observation of the proper notion and doppler shift
  6. 13. conducted spectogrpahic studies in the 1920s
  7. 14. parallax defined as the angle subtended at the object by the semi-major axis of earths orbit
Down
  1. 1. this theory perfectly explains the abundance of helium and hydrogen in the universe
  2. 2. the process of determining the distance to star cluster
  3. 3. it only orbits around the sun and has enough gravity pull itself into spherical shape
  4. 4. is an event when a planet crosses in front of a star as viewed by an obsever
  5. 6. it makes use of the fact that as a planet moves towads or away from us
  6. 8. can be determined by the time elapsed since its brith
  7. 11. is a planet that does not orbit the sun