Stellar astronomy

1. Photographs of the spectrum of Nova Persei 1901. From Walter Sidgreaves, S.J., "Nova Persei. February 28 to April 4: Stonyhurst college observatory", ApJ vol. 13 (1901), 278-279, plate 10.
2. The Ring Nebula in Lyra. Slitless Spectrogram. (W. H. Wright) From A.S. Eddington, Stars and Atoms (London, 1942). Picture taken from the on-line edition published by Eric Hutton (used here with permission).