Callahan, Shawn

3 results.

Apache Point Observatory Buildings, Instruments, Equipment, Grounds

Apache Point Observatory Buildings, Instruments, Equipment, Grounds

O'Dell Eschelle Spectrograph 46:1 (2008-003)
Series VI: Yerkes Observatory

Yerkes Observatory Staff

Yerkes Observatory Staff

Group photograph, 1986 2:38 (2013-082)
Series VI: Yerkes Observatory

Yerkes Observatory Staff

Yerkes Observatory Staff

Group photograph, 1986 47:90 (2008-003)
Series VI: Yerkes Observatory

3 results.