Astronomy: Biographies
- Oil sands
- Percival Lowell
- Pierre Jules Cesar Janssen
- Pierre Simon marquis de Laplace
- Pietro Angelo Secchi
- Ptolemy
- Samuel Heinrich Schwabe
- Samuel Pierpont Langley
- Sherburne Wesley Burnham
- Simon Newcomb
- Sir Arthur Stanley Eddington
- Sir Bernard Lovell
- Sir David Gill
- Sir Frank Watson Dyson
- Sir Fred Hoyle
- Sir George Biddell Airy
- Sir James Hopwood Jeans
- Sir John Frederick William Herschel
- Sir Sandford Fleming
- Sir William Herschel