Discover the Hertzsprung-Russell diagram, a key tool graphing the brightness of stars against color in astronomy. That's really funny, and I wish I had thought of it. The vertical axis is fame, as ...

A simple diagram, which celebrates its centennial this year, continues to serve as the most essential conceptual tool in stellar astrophysics Modern astronomy paints a vivid picture of the universe ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. If you sampled the hundreds of billions of stars in any galaxy and plotted their luminosity ...