Hеnriеttа Swаn Lеаvitt (Julу 4, 1868 – Dесеmbеr 12, 1921) wаѕ an Amеriсаn аѕtrоnоmеr whо diѕсоvеrеd thе relation bеtwееn thе luminоѕitу and thе реriоd оf Cepheid Full Biography
Since the [Cepheid] variables are probably at nearly the same distance from the Earth, their periods are apparently associated with their actual emission of light, as determined by their mass, density, and surface brightness. Henrietta Swan Leavitt
Since the [Cepheid] variables are probably at nearly the same distance from the Earth, their periods are apparently associated with their actual emission of light, as determined by their mass, density, and surface brightness.
It is worthy of notice that in Table VI the brighter variables have the longer periods. Henrietta Swan Leavitt
It is worthy of notice that in Table VI the brighter variables have the longer periods.
It is to be hoped, also, that the parallaxes of some variables of this type may be measured. Henrietta Swan Leavitt
It is to be hoped, also, that the parallaxes of some variables of this type may be measured.
