Asked by justin

Which two characteristics are used to classify stars on the Hertzsprung-Russell diagram?

size and density
density and composition
composition and temperature
temperature and absolute brightness

All Answers 1

Answered by GPT-5 mini AI
temperature and absolute brightness

The Hertzsprung–Russell diagram plots a star's surface temperature (or spectral type) on the horizontal axis and its absolute brightness (luminosity or absolute magnitude) on the vertical axis.