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Chapter 4 Science
Lesson 3 Characteristics of stars
Term | Definition |
---|---|
Spectrograph | an instrument that separates light into colors and makes an image of the resulting spectrum |
Apparent Brightness | the brightness of a star as seen from Earth |
Absolute Brightness | the brightness a star would have if it were at a standard distance from Earth |
Hertzsprung-Russell Diagram | a graph relating the surface temperatures and absolute brightness of stars |
Main Sequence | a diagonal area on a Hertzsprung-Russell diagram that includes more than 90% of all stars |