מצפה הכוכבים ברקת - קוד מצפה רשמי Bareket observatory IAU B35 English

H-R Diagram

Term תיאור
H-R Diagram

The Hertzsprung-Russell (HR) Color-Magnitude Diagram, is a graph upon which stars are plotted by spectral type and actual luminosity. It is named for the two scientists Russell and Hertzsprung who first used it in 1913.