Estimates variable stars plates centauri de hertzsprung ejnar (1 resultados)

Soft cover. Condición: Good. HERTZSPRUNG, Ejnar. Estimates of 64 Variable Stars on Plates of the [Beta] Centauri Region, taken by the late H. Van Gent. Offprint: Annalen van de Sterrewacht te Leiden deel XX, derde stuk; 1950 Haarlem); 12"x 9", pp 121-172". Ejnar Hertzsprung, (1873-1967), Danish astronomer who classified types of stars by relating their colour to their absolute brightnessan accomplishment of fundamental importance to modern astronomy. The Hertzsprung-Russell diagram of stellar types was named (in part) for him. In 1913 he established the luminosity scale of Cepheid variable stars, a tool for measurement of intergalactic distances."--Britannica.…