astronomy

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Across
  1. 1. Southernmost point of orbital path
  2. 3. the imaginary shell we draw around the Earth which shows how we view objects in space
  3. 8. The time from one vernal equinox to next
  4. 10. the daily progress of the sun and stars across the sky
  5. 13. observation, theory, prediction, observation,
  6. 14. Northernmost point of orbital path
  7. 15. study of the universe
  8. 16. when the moon passes between the Earth and sun, blocking the sun
  9. 17. 23 hours and 56 minutes, the time it takes for the Earth to rotate on its axis
  10. 18. Lies directly over the South Pole of the Earth
Down
  1. 2. The path that the sun makes through the sky
  2. 4. combination of day length and sunlight angle
  3. 5. Lies directly over the North Pole of the Earth, contains the North Star “Polaris”
  4. 6. The twelve constellations the Sun moves through during the year
  5. 7. Projection of the Earth’s Equator into space
  6. 9. caused by the way light from the sun shines or does not shine on the moon
  7. 11. when the earth's orbit blocks the sun from the moon
  8. 12. what we consider a 24-hour day