Hertzsprung - Russell Diagram is the software implementation of H-R [Hertzsprung-Russell] diagram in stellar astronomy. This software is to make the H-R diagram a little bit more handy to the astronomers adding some extra features inspite of just getting Temperature(K) and Absolute magnitude of a star. It serves the data about the Luminosity and Radius of a star, for a Sun-like star it gives the data about Mass, Life-Expectancy when you click on...