Names
- Pettit, Edison, 1889-1962.1
- Pierce, A. Kieth1
- Pierce, Austin Keith1
- Pierce, Austin Keith, 1918-1
- Portage Lake Observatory (University of Michigan)1
- Pyke, Alfred Joseph, 1880-1
- Pyke, Alfred Joseph.1
- Quarles, Donald Aubrey, 1894-1959.1
- Rabaut, Louis Charles, 1886-1
- Rabaut, Louis Charles, 1886-1961.1
- Reynolds, Harrison G.1
- Rice, Warner Grenelle, 1899-1
- Russell, Henry Norris, 1877-1957.1
- Ruthven, Alexander Grant, 1882-1
- Ruthven, Alexander Grant, 1882-1971.1
- Röosch, Jean1
- Röosch, Jean.1
- Sass, Samuel, 1915-1
- Sawyer, H. E.1
- Schauer, Charles Hawver, 1912-1