Hertzsprung–Russell diagram - Wikipedia

Main Sequence: For The Racehorse, See, PDF, Stars

Basics of Hertzsprung-Russell (HR) Diagrams

Planetguard

Binary Stars Live Complicated Lives, Especially Near the End - Universe Today

Part 3- post test 1, Part 4 Flashcards

Visual Physics Online

Hertzsprung-Russell diagram - Citizendium

2: Illustration of the triple-alpha process. Adopted from Wikipedia

Red Dwarf Stars

What is the Hertzsprung–Russell diagram? - Quora

Russell - The Moon

What is the Hertzsprung Russell diagram? What are some examples of stars evolving from main sequence to giant and supergiant stages? What are their properties? - Quora

Creating a stellar color-magnitude (or Hertzsprung-Russell) diagram — NASA-NAVO Workshops Notebooks