I need help on the hertzsprung Rusell thing! PLEASE HELP!?

Question

This is what my instruction were:

Choose 3 stars and classify them under the Hertzsprung Russell Star Classification.

So we are doing Astronomy in science but I have never heard of this, What is it and what do I do? I am very confused.

Answer 1

The Hertzsprung -Russell (H-R) Diagram is a graph that plots stars color (spectral type or surface temperature) vs. its luminosity (intrinsic brightness or absolute magnitude). On it, astronomers plot stars' color, temperature, luminosity, spectral type, and evolutionary stage. This diagram shows that there are 3 very different types of stars:

Answer 2

Try this

http://en.wikipedia.org/wiki/Hertzsprung...