Ejnar (ˈəɪnar). 1873–1967, Danish astronomer: he discovered the existence of giant and dwarf stars, originating one form of the Hertzsprung-Russell diagram
Danish astronomer who specialized in photographing the stars and introduced the concept of absolute magnitude. Hertzsprung also demonstrated the relationship between the surface temperature of stars and their absolute magnitude, but his work was ignored until Henry Russell independently developed a similar correlation, which is now named after both of them.
- Hertzsprung-Russell diagram
[hairt-sproo ng-ruhs-uh l] /ˈhɛərt sprʊŋˈrʌs əl/ noun, Astronomy. 1. the graph showing the absolute magnitude plotted against the surface temperature for a group of stars. /ˈhɜːtssprʌŋˈrʌsəl/ noun 1. a graph in which the spectral types of stars are plotted against their absolute magnitudes. Stars fall into different groupings in different parts of the graph See […]
[hurts-burg] /ˈhɜrts bɜrg/ noun 1. Gerhard [gair-hahrd,, -hahrt] /ˈgɛər hɑrd,, -hɑrt/ (Show IPA), 1904–1999, Canadian physicist, born in Germany: Nobel Prize in Chemistry 1971.
[her-tsuh-goh-vee-nuh] /ˌhɛr tsə goʊˈvi nə/ noun 1. a historic region in SE Europe: a former Turkish province; a part of Austria-Hungary 1878–1914; now part of . /ˌhɜːtsəɡəʊˈviːnə/ noun 1. a region in Bosnia-Herzegovina: originally under Austro-Hungarian rule; became part of the province of Bosnia-Herzegovina (1878), which was a constituent republic of Yugoslavia (1946–92) former Austrian […]
/Russian ˈɡjɛrtsən/ noun 1. Aleksandr (Ivanovich) (alɛkˈsandr iˈvaːnovitʃ). 1812–70, Russian socialist political philosopher: best known for his autobiography My Past and Thoughts (1861–67)