In fact, stars fell into several groups, and over the years we've learned about why that happens. Most stars are stable, like the Sun, and fall into the Main Sequence of the plot. Some are old, some ...

Now known as the Hertzsprung-Russell diagram, this shows most stars sticking close to a long, ... The Sun is very much a main sequence star, in the G-type category (G2V to be precise).

The diagram contains a group of stars that form a diagonal line below the main sequence, which means they are dimmer than main-sequence stars of the same temperature and color.

The only place that's likely to happen is at the very center of our galaxy. And, for a while, there was an excess of ...

While main sequence stars trace a diagonal line on the H-R diagram, red giant stars create a horizontal line in varying shades of red. This is called the red giant branch.

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). Because stable main sequence ...

Finally, there is a second large group outside the main sequence. Stars in this group are all located in the upper area of the Hertzsprung- Russell diagram with very high absolute brightness values.

Stars are often organized using what's known as the Hertzsprung-Russell (H-R) diagram. Stars like Earth’s sun that burn hydrogen into helium are in a group called the "main-sequence." You may like ...

H-R Diagram of media stars. By Phil Plait. July 27, 2010 12:00 PM. Tweet Share Share Comment Tweet Share Share Comment Graphing variables is a critical skill in science. If ...