HR Diagram.

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Presentation transcript:

HR Diagram

Some STAR characteristics are: Magnitude: How bright a star ranks on a numerical scale ( - is bright, + is dim) Luminosity: Energy output of a star in Watts (just like a lightbulb)

SPECTRAL CLASS: Categories of age, color, and temperature Spectral Class categories: O, B, A, F, G, K, M [Oh Be A Fine Girl, and Kiss Me ]

The Hertzsprung-Russell Diagram is a scatter plot that is 4-directional: it tells you the spectral class, magnitude, power, and temperature of a star.

Is a Red Supergiant or a White Dwarf brighter?

Is a Blue Dwarf or a White Dwarf hotter?

Is a reddish main sequence star or the sun younger?

Does a Red Giant or a Blue Giant generate more power from fusion?

What spectral class does White Dwarf stars belong to?

Describe 3 pieces of information about the sun from this diagram:

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