The Earliest Comet Photographs: Usherwood, Bond, and Donati 1858 Pasachoff, Jay M. ; Olson, Roberta J. M. ; Hazen, Martha L. Abstract Publication: Journal for the History of Astronomy Pub Date: May 1996 DOI: 10.1177/002182869602700202 Bibcode: 1996JHA....27..129P