Skip to content

Course home

x
Hertzsprung-Russell diagrams and stellar evolution
x

Reading the H-R diagram

Reading the H-R diagram

H-R diagram with luminosity against surface temperature, showing the main sequence, red giants, red supergiants, white dwarfs, and the Sun

An H-R diagram plots stars by luminosity and surface temperature. Luminosity is a star's true power output, measured in watts, so it avoids the distance problem that affects apparent brightness.

Hertzsprung-Russell diagrams and stellar evolution Lesson

  1. AS Level
  2. /Physics
  3. /Hertzsprung-Russell diagrams and stellar evolution

Step-by-step lessons on Edexcel AS Level Physics Hertzsprung-Russell diagrams and stellar evolution. Each one builds up to exam-style questions.

Lessons