Names
- Majumdar, K.1
- Malesky, George.1
- Marley, Faye1
- Masterson, Keith D.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
- McMath Solar Telescope.1
- McMath, Francis Charles, 1867-1938.1
- McMath, Robert R.1
- McMath, Robert R. (Robert Raynolds), 1891-19621
- McMath, Robert Raynolds, 1891-1962.1
- McMath-Hulbert Observatory (University of Michigan)1
- McMillin, J. B.1
- McQuesten, Mrs. Herbert E.1
- Meader, George, 1907-1
- Meader, George, 1907-1994.1
- Meggers, William F.1