Star Charting Terms and Ancient Astronomy Instruments

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Across
  1. 4. instrument for determining the angle between the horizon and a celestial body such as the Sun, the Moon, or a star, used in celestial navigation to determine latitude and longitude.
  2. 9. an instrument used to determine the local time based on the relative positions of two or more stars in the night sky
  3. 12. the handheld model/map of the observable universe
  4. 15. a prehistoric monument consisting of a circle of stone or wooden uprights
  5. 19. “a pork clock” or a portable pocket sundial made to resemble cured ham used in ancient Greece.
  6. 20. “little ship of Venice”
  7. 22. the line at which the earth's surface and the sky appear to meet
  8. 23. a navigational tool made of a stick and a string
  9. 24. a rotating paper “wheel chart”
  10. 25. (a sphere) early astronomical device for representing the great circles of the heavens, including in the most elaborate instruments the horizon, meridian, Equator, tropics, polar circles, and an ecliptic hoop. The sphere is a skeleton celestial globe, with circles divided into degrees for angular measurement
  11. 26. The repeating circle
Down
  1. 1. an optical instrument designed to make distant objects appear nearer
  2. 2. a great circle on the celestial sphere that is perpendicular to the horizon
  3. 3. was a device invented by Galileo Galilei to observe Jupiter's moons with the purpose of finding longitude on Earth. It took the form of a piece of headgear with a telescope taking the place of an eyehole
  4. 5. a compass
  5. 6. height from the horizon
  6. 7. is a star chart analog computing instrument in the form of two adjustable disks that rotate on a common pivot
  7. 8. a type of horizontal sundial with a vertical gnomon
  8. 10. Ascension Longitude
  9. 11. the point directly above your head
  10. 13. “spheres” “wheels” “whirlwinds” “the wheels of galgallin, fiery flame of the four eye-covered wheels” as depicted in Ezekiel’s vision of the chariot.
  11. 14. aka “sine quadrant” used by medieval Arabic astronomers used to measure celestial angles
  12. 16. “one that knows or examines”
  13. 17. celestial Latitude
  14. 18. a horological device that tells the time of day
  15. 21. a mechanical model of the solar system, or of just the sun, earth, and moon, used to represent their relative positions and motions