Craters Messier (left one) and Messier A (right one) on the Moon, in Mare Fecunditatis. Photo by Apollo 11 (1969), view from northwest.
<p>This photo was used in Figure 1-13 in the <i>Apollo 11 Preliminary Science Report</i> (NASA SP-214), 1969, which has the following caption:
</p>
<dl><dd>This is a telephoto view of the craters Messier and Messier A. The atypical shape of these craters has caused considerable controversy concerning the mode of origin. (NASA AS11-42-6305)</dd></dl>
NASA
1969
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