Names
- Lee, Gilbert Lamont, 1919-1
- Malesky, George.1
- Maxwell, Allen Douglas.1
- Mayall, N. U. (Nicholas Ulrich), 1906-1993.1
- Mayall, Nicholas Ulrich, 1906-1
- McClure, Roy Donaldson, 1882-1951.1
- McDowell, C. S.1
- McGregor, Tracy William, 1869-1936.1
- McLaughlin, Dean B. (Dean Benjamin), 1901-1965.1
- McMath Solar Telescope.1
- McMath, Francis Charles, 1867-1938.1
- McMath, Robert R. (Robert Raynolds), 1891-19621
- McMath, Robert R. (Robert Raynolds), 1891-1962.3
- McMath, Robert Raynolds, 1891-1962.1
- McMath-Hulbert Observatory (University of Michigan)2
- Meinel, Aden B.1
- Menzel, Donald H. (Donald Howard), 1901-1976.2
- Menzel, Donald Howard, 1901-2
- Merrill, Paul W. (Paul Willard), 1887-1
- Merrill, Paul W. (Paul Willard), 1887-1961.1