Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke4095.&link_type=abstract
"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 4095. Bristol: Institute of Physics Publishing, 2001
Astronomy and Astrophysics
Astronomy
History And Archaeoastronomy, Biographies
Scientific paper
Astronomer and spectroscopist, became a staff member at Mount Wilson Observatory. He studied stellar chromospheres and stellar activity cycles, showing by intensive analysis of the H and K lines of ionized calcium that other stars besides the Sun have cycles of activity. With M K VAINU BAPPU, he found a means of determining luminosity, and thus distance, of stars from the widths of the emission i...
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