8A05.75 - Quadrant / Astrolabe
There are quadrant type units on the west side of the Van Allen Hall roof. DO NOT look directly at The Sun with these unit. Rather, use a screen at the back side to align the telescope.
The 180 degree protractor models can be easily adapted to work as quadrants.
- Christopher Sirola, "Lunar Astrometry", TPT, Vol. 59, #7, Oct. 2021, p. 590.
- Windsor A. Morgan Jr., "Quadrant to Measure The Sun's Altitude", TPT, Vol. 51, #7, Oct. 2013, p. 420.
- Michael Robinson, "Astronomy with Chaucer: Using an Astrolabe to Determine Planetary Orbits", AJP, Vol. 90, #10, Oct. 2022, p. 745.
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