Biographical Dictionary of Great Astronomers

able Academy of Sciences accurate American Astronomer appointed Assistant Astronomical Society atmosphere awarded became become began bodies born British calculated California called Cambridge catalogue centre College comets complete continued contributions death detected determine developed died Director discovered discovery distance early Earth eclipse educated effect elected established father Fellow field French galaxies George German graduated gravitational Harvard important Institute interest Italy John joined known later light lines London magnitude major Mars Mathematician mathematics matter measured Medal method Moon motion Mount Wilson moved named nebulae observations Observatory obtained obtained his Ph.D orbits origin parallax Paris period photographic Physics planetary planets positions produced Professor of Astronomy proposed published radiation radio relativity remained retired returned rotation Royal Royal Society satellite showed Society Solar Solar System space spectra spectroscopic stars stellar studied telescope temperature theory United University