The Hertzsprung–Russell diagram
Plot stars by brightness against temperature and they refuse to scatter: they fall into a main sequence, a giant branch and a dwarf corner. The shape of the scatter turned out to be the life story of stars.
Preview from A modern version, Wikimedia Commons, CC BY 4.0, shown from their site.
By
Ejnar Hertzsprung and Henry Norris Russell · 1911
Where
Science & health · Astronomy
Form
Static image · to explore
Visual
Position, Colour, Density
Data
Stellar brightness and spectral class
Original