Ch. 15-1 Stars Chapter 19, Section 1 Part 2.

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Presentation transcript:

Ch. 15-1 Stars Chapter 19, Section 1 Part 2

Classifying Stars Stars are classified by how hot they are. Different surface temperatures result in different colors.

Brightness of Stars The lower the magnitude = the brighter the star. (Sun = -26.8) Magnitude means size, or in this case brightness.

2 Ways To Look At Brightness Apparent Magnitude – How bright the star really looks from Earth. The farther away from us, the dimmer the star looks. Absolute Magnitude – How bright the star really is. If all stars were the same distance from us, how bright would it look compared to the other stars.