HR+Diagrams

This is a HR **Diagram**

//Please note//: it's actually //not// a graph this is because of the non-mathematical temperature scale.

Anything higher than a Luminosity of 1 is brighter than the Sun - even if it doesn't seem so from the Earth. //Remember//: Luminosity is not the light received on the Earth - that's intensity.

//Remember//: Stars spend most of their lives on the main sequence. A star’s luminosity (power output) depends on its surface area and its temperature.