Topic 1 Review

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Across
  1. 3. The last name of the man who proposed the heliocentric model
  2. 5. Days of the year where there are equal hours of daylight and night
  3. 6. The model of the universe in which the Earth was at the center
  4. 9. A region of space in which a star is born
  5. 12. The model of the universe in which the Sun was the center
  6. 14. An smaller group of stars within a constellation
  7. 15. The forth planet from the sun
Down
  1. 1. A form of ancient technology used to measure the angle of a star from the horizon
  2. 2. A group of stars in the night sky
  3. 4. The man who proposed the false geocentric model
  4. 7. A form of ancient technology used to measure time using shadows
  5. 8. The unit of measurement from the Earth to the Sun
  6. 10. The longest and/or shortest day of the year
  7. 11. The main gas in a star
  8. 13. The sixth planet from the sun