Ejnar Hertzsprung and Henry Russell H for Hertzsprung and R for Russell
main-sequence stars
It was invented in July 1880
Sankey diagram is named after Irish Captain Matthew Henry Phineas Riall Sankey. He first used this type of diagram in 1898.
The mathematical Carroll diagram was developed by Lewis Carroll. Carroll studied at the University of Oxford and later became a teacher of mathematics at Oxford.
I think it would be pretty safe to say he invented the Venn Diagram
The colors of the HR Diagram are:BlueBlue-WhiteYellowOrangeRed-OrangeRed
The main reason that the HR Diagram is so useful and important to scientists is, you can tell the size of the star by plotting it on the HR Diagram. The different sizes of stars form a pattern on the HR diagram.
The HR diagram contains only stars - so everywhere.
Of course they are on the HR diagram. They are simply not on the main sequence.
i don't know about the hr diagram but the brightest star known is r136a1
Niels Bohr invented the bohr diagram.
HR diagram
The red dwarves.
Up at the top right. If you look on the Australian Telescope National facility website, their HR diagram shows this clearly.
Black holes dont appear on HR diagrams because HR diagrams are used to classify stars not find black holes Black holes emit no visible light (are not luminous enough) and therefore do not appear in the HR diagram.
Our Sun is a G2V star and will thus appear in the centre of the HR diagram.
Main sequence