Messier & Messier A
                                Earth-based telescopic image                                          Apollo 11 image
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 Image by Legault
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Messier is an oval crater elongated in an E-W direction. Its size is 9 x 11 km and it may have originated as the result of an oblique meteorite impact from space. Messier A comprises two circular craters: The younger, eastern crater overlaps part of the smaller, older formation. This twin crater measures 11x13 km.  To the west, two straight narrow rays, resembling the tail of a comet, trail across the surface of Mare Fecunditatis to a distance of about 120 km. 
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This web page was created by Francis Ridge for The Lunascan Project:
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