So, good gracious, the Britannica image took. And the reason I believe it is a straightline downward and not a curve downward is that it is a graph of simultaneous north and south magnetic monopoles, instead of one.
So, the huge huge trouble with Old Astronomy Hertzsprung-Russell Diagram, is that those fools thought stars shine from Fusion, when in truth, they shine from Faraday Law going on inside every proton that resides in that star, as the muon thrusts through the proton torus, where proton = 840 MeV and muon = 105MeV.
This makes all stars, especially our Sun fit into a diagram where the y-axis is Mass of star, and the x-axis is the spectral-temperature of the star. A STRAIGHTLINE downward graph.
And where the silly stupid White Dwarfs belong in the blue star part of the graph and all those silly Red Giant stars belong in the red star part of the straightline graph.
When stars are of different sizes, yet the same temperature, is due to the fact that Old Astronomy never recognized stars can have Rings, like Saturn has rings, around the star, making dumb astronomers here on Earth think it is a Giant star. Much in the same way that dumb astronomers would think Saturn is a giant planet almost equaling the size of our Sun because they see Saturn head on with its rings in full display.
I am reasonably sure that the true graph of a revised HR diagram is a straightline downward graph because the spectra line is directly proportional to the mass of the star doing the Faraday Law.
But it will be many months before I publish this book and have that time to settle in my mind if all is correct.
AP, King of Science