H-R Diagram of media stars Discover the Hertzsprung-Russell diagram, a key tool graphing the brightness of stars against color in astronomy.

The Hertzsprung-Russell (H-R) diagram is simple. It plots two basic properties of stars: their luminosity (intrinsic brightness) and their surface temperature (as revealed by their color).

Stars come in different types, and most stars will change types throughout their lifetimes. Stars are often organized using what's known as the Hertzsprung-Russell (H-R) diagram.

NGC 6397 contains more than 400,000 stars, which gives us a lot of points. Using the color and magnitude of each star, we can convert to temperature and luminosity and put them on the H-R diagram.

The H-R diagram is just a graph of stars’ brightnesses versus their temperatures. When plotted together, they produce a clear, curved line, from top left to bottom right.

Need a break? Play the USA TODAY Daily Crossword Puzzle. On the H R Diagram, you can see that stars gather in groups. 90% of all stars are Main Sequence stars.

While single stars are more difficult to deal with, we can still derive ages (and masses) by locating each star on temperature and luminosity plots (HR diagrams).

IT has been suggested several times1 that the flare activity observed in flash and U V Ceti stars is of a nature similar to that of solar flares. In this communication I shall adhere to this point ...

And now my friend Stuart who runs Astronomy Blog has done it one better: he’s created an H-R diagram of media stars. It’s awesome: That’s really funny, and I wish I had thought of it. The ...