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Stars

Stars. How do we classify Stars? Star Properties Color = _______________ Size = ________________ Number = _____________. Properties of Stars. Astronomers classify stars by their color, size, and brightness . Other properties of stars are chemical composition and mass.

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Stars

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  1. Stars

  2. How do we classify Stars? Star Properties Color = _______________ Size = ________________ Number = _____________

  3. Properties of Stars Astronomers classify stars by their color, size, and brightness. Other properties of stars are chemical composition and mass.

  4. Color = Temperature– a stars color indicates the temperature of its’surface. The hottest stars appear ______. The cooler stars appear ______. The spectrum of color in a star is from blues to greens to yellows and reds.

  5. Size = Age Think: What do you think happens to the size of stars as they get older? -----------------------

  6. Video: http://www.youtube.com/watch?v=PM9CQDlQI0A1. What did you learn about star size?2. How does this clip relate to what else we have been learning?

  7. Number = Amount of Brightness • The brightness of a star as viewed from Earth is dependent on many factors such as color intensity and distance. • Apparent Magnitude/Brightness: the brightness of a star as it appears from Earth. • The apparent magnitude/brightness decreases as its distance from you increases • Absolute Magnitude/Brightness or Luminosity how bright a star really is. Which of these new words mean the same thing?

  8. Hertzsprung-Russell Diagram (H-R Diagram)

  9. Use your notes to compare/contrast these terms:1. Magnitude:2. Absolute Magnitude:3. Apparent Magnitude:Size and Comparison of the Universe video:https://www.youtube.com/watch?v=4S69zZwYrx0

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