The Telescopes of Angell Hall Observatory (1926-1994).
by Dave Snyder
Revised: November 2004
The Angell Hall Observatory
Between 1926 and 1994, there were two domes on the roof of Angell Hall.
One dome held a 25 centimeter (10 inch) refractor and the other dome held a
38 centimeter (15 inch) reflector. These domes were dismantled and replaced
with a single 40 centimeter reflecting telescope in 1994/1995. The following
shows the Angell Hall telescopes before they were dismantled in 1994.
Domes on the top of Angell Hall
This shows the two domes, as seen from the roof of Angell Hall.
38 centimeter (15 inch) Reflector
- A. Finder telescope
- B. Eyepiece
- C. Focus control
- D. Declination fine adjustment
- E. Declination clamp
- F. R. A. fine adjustment
- G. R. A. clamp
- H. Hour Angle (R. A.) setting circle
- I. Declination setting circle
- J. Counterweights
- K. Clock drive
- A. Finder telescope
- B. Eyepiece
- C. Focus control
- D. Declination fine adjustment
- E. Declination clamp
- F. R. A. fine adjustment
- G. R. A. clamp
- H. Hour Angle (R. A.) setting circle
25 centimeter (10 inch) Refractor
- A. Finder telescope
- B. Eyepiece
- D. Declination clamp
- F. R. A. clamp
- H. Declination setting circle
- I. R. A. setting circle
- J. R. A. wheel
- K. Clock drive (inside).
- A. Finder telescope
- B. Eyepiece
- C. Focus control
- D. Declination clamp
- E. Declination fine adjustment
- F. R. A. clamp
- G. R. A. fine adjustment
Photo Credits
The photographs are courtesy the University of Michigan Department of
Astronomy (they appeared in a lab manual for Angell Hall; the photographer is unknown).
Links
Modified August 11, 2025