Example image of eyePlorer eyePlorer map for 'Henry Norris Russell': 1877 1957 Astronomer Ejnar Hertzsprung February 18 Hertzsprung–Russell diagram October 25 United States Angular momentum coupling Oyster Bay, New York Bachelor of Arts Charles Augustus Young Princeton University Cambridge Observatory Carnegie Institution for Science George Darwin Princeton, New Jersey Frank K. Edmondson John Quincy Stewart Raymond Smith Dugan Luminosity Vogt-Russell theorem Stellar evolution Henry Norris Henry Russell Term symbol Timeline of stellar astronomy 1762 Russell Franklin Medal H. N. Russell Main sequence Russell (Martian crater) Charlotte Moore Sitterly Lyman Spitzer Russell (surname) Princeton Cemetery 1877 in science White dwarf Scientific phenomena named after people Harlow Shapley List of astronomers Chamberlin-Moulton planetesimal hypothesis 1957 in science Dwight H. Terry Lectureship Cecilia Payne-Gaposchkin Gravitational shielding Planetary nebula Outline of astronomy History of Solar System formation and evolution hypotheses Astronomical spectroscopy