AhaBulbStuff Everyone Should Know
AhaBulb: Stuff Everyone Should Know · ahabulb.com/astro-hr-diagram-axes

The Hertzsprung-Russell diagram plots stars by which two properties?

Start playing free

  1. Mass and distance
  2. Luminosity and surface temperature
  3. Age and color index only

🔒 The answer is for AhaBulb members. Members see the answer, why it's right and the official sources for every card of Stuff Every Astronomer Should Know, plus timed practice exams.

The first 50 cards of every test are free to play.

Play the free cards See membership

Like this card?
Play the game

References

  1. Astronomy 2e, 18.4 The H-R Diagram openstax.org/books/astronomy-2e/pages/18-4-the-h-r-diagram Checked 2026-10-10.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Astronomy & SpaceWhat is the order of the main stellar spectral classes from hottest to coolest?Astronomy & SpaceWhat balance keeps a stable star like the Sun from collapsing or flying apart?Astronomy & SpaceWhat does a star's color mainly tell you?

That's stuff everyone should know.