Description
Yerkes Messier 51 Canum Venaticorum 1902.jpg
English:
A photo of the galaxy Messier 51 taken on June 3, 1902
Date
Source
ASTRONOMICAL PHOTOGRAPHY WITH THE FORTY-INCH REFRACTOR AND THE TWO-FOOT REFLECTOR OF THE YERKES OBSERVATORY
Author
G.W. RITCHEY
Licensing
Public domain
Public domain
false
false
This work is in the
public domain
in its country of origin and other countries and areas where the
copyright term
is the author's
life plus 70 years or fewer
.