Crossword for Intro Astro Lecture 2

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Across
  1. 4. Imaginary projection of the sun, moon, planets, stars,and all astronomical bodies upon an imaginary sphere surrounding Earth
  2. 7. The angle of the object around the horizon (0-360 degrees)
  3. 9. Stars that circle the celestial poles (never sets)
  4. 10. When the Sun crosses the celestial equator
  5. 12. Projection of Earth's equator into sky
  6. 14. Where you find the main zodiac constellations in the sky
  7. 16. Measured from celestial equator (-90 degrees (s) to +90 degrees (N))
  8. 17. All points 90 degrees away from Zenith
Down
  1. 1. Measured between circles (0h0m0s to 23h59m59s)
  2. 2. Halfway between the equinoxes when the longest and shortest nights of the year occur
  3. 3. Altitude of Polaris/North Celestial pole in your sky is equal to your latitude
  4. 5. The angle above the horizon (0-90 degrees)
  5. 6. Point directly underneath (opposite of Zenith)
  6. 8. Coordinate system that gives positions of stars in the local sky due to local horizon and Zenith point (Alt/Az)
  7. 11. the point directly overhead
  8. 13. Coordinate system that defines unique positions on the selestial sphere (RA/Dec)
  9. 15. Line that passes through Zenith, connecting North and South points on horizon