Crossword for Intro Astro #2

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Across
  1. 1. Position North or South of the equator
  2. 11. Earth’s rotation period as defined by the positions of the stars in the sky, the time between successive passages of the same star through the meridian
  3. 13. The time it takes for the Sun to return to its original position in the Earth’s sky
  4. 14. The time it takes for the Earth to orbit the Sun related to the “fixed” stars
  5. 15. The angular distance north or south of the celestial equator
  6. 16. Measured eastwards from the north point
  7. 17. A great circle on the celestial sphere 90° from the zenith; more popularly, the circle around us where the dome of the sky meets Earth
  8. 19. The time interval in which the phases repeat – from full-to-full phase
  9. 20. Earth’s rotation period as defined by the position of the Sun in the sky, the time between successive passages of the Sun through the meridian
  10. 21. Coordinate system used to pinpoint the position of a celestial object in the sky in refence to the celestial equator
Down
  1. 2. Occurs September 22nd every year signifying Autumn/Fall
  2. 3. A great circle on the celestial sphere 90° from the celestial poles, where the celestial sphere intersects the plane of Earth’s equator
  3. 4. Measured from the celestial horizon to the star in the sky
  4. 5. Circles the celestial poles and do not set
  5. 6. A great circle on the celestial sphere that passes through the poles
  6. 7. The angular distance of a celestial object measured eastward along the celestial equator from the vernal equinox
  7. 8. The period of the Moon’s revolution about Earth measured with respect to the stars
  8. 9. Slow, cyclic wobbling of Earth’s axis of rotation, that’s caused by the gravitational forces of the Sun, Moon, and planets
  9. 10. Occurs March 20th every year signifying Spring
  10. 12. The point directly above the observer
  11. 18. Position East or West of the prime meridian