HR Diagram

  This program simulates the Hertzsprung–Russell (HR or H-R) diagram for groups of stars. The diagram is a scatter plot of stellar luminosity vs. stellar temperature. The luminosity of stars is proportional to R² T⁴., and for Main Sequence stars, their luminosity is also proportional to M^3.5. Since the range of stellar luminosities and stellar temperatures is so large, the plot uses a log-log scale.

The diagram is a way to understand stellar evolution: stars spend most of their lives on the Main Sequence (the main downward sloping line on the diagram), while older giant stars are found above this line to the right and white dwarfs below this line to the left. The HR diagram shows nearby stars, bright stars, and a user-defined star. Give HR Diagram a try to fully assess its capabilities!