Allegheny Observatory Buildings, Instruments, Equipment

2 results.

Allegheny Observatory Buildings, Instruments, Equipment

Allegheny Observatory Buildings, Instruments, Equipment

31-inch Reflector Telescope 98:45 (2008-003)
Series VI: Yerkes Observatory

Allegheny Observatory Buildings, Instruments, Equipment, Grounds

Allegheny Observatory Buildings, Instruments, Equipment, Grounds

Main Observatory 98:38 (2008-003)
Series VI: Yerkes Observatory

2 results.