Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
3 Cards in this Set
- Front
- Back
|
In Hertzsprung - Russell Diagram each star is represented by dot.
The position of each dot on the diagram tells us two things about each star: its luminosity (or absolute magnitude) and its temperature. The vertical axis represents the star's luminosity or absolute magnitude. |
The horizontal axis represents the star's surface temperature. (only the surface because we can't see the inside of the stars)
Higher (hotter) temperatures are on the left. Lower (cooler) temperatures are on the right. Some HR diagrams include the color of stars as they can be seen through filters on spectrophotometers. |
|
|
A star in the upper left corner of the diagram would be hot and bright.
A star in the upper right corner of the diagram would be cool and bright. A star in the lower left corner of the diagram would be hot and dim. A star in the lower right corner of the diagram would be cold and dim. |
Most of the stars lie within a region called the main sequence. It looks kind of like a curved line sloping from the upper-left to the lower-right of the HR diagram.
|
|
|
hhhhhhhh
|
jjjjjjjjjjjjjjjjj
|
