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Fiona Ward Emily Linden. “Explain the usefulness of classifying stars according to their colors, surface temperatures, and spectral characteristics.”

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Presentation on theme: "Fiona Ward Emily Linden. “Explain the usefulness of classifying stars according to their colors, surface temperatures, and spectral characteristics.”"— Presentation transcript:

1 Fiona Ward Emily Linden

2 “Explain the usefulness of classifying stars according to their colors, surface temperatures, and spectral characteristics.” THE QUESTION

3 Color and Blackbody Curve Determines surface temperature Works for any star regardless of distance Color Index + Photometry + Stellar Spectra = Color = Temperature COLORS This slide: Astronomy Today textbook

4 Temperature + Color = Composition The biggest and brightest stars are the hottest. Some can grow to be 100 times bigger than our Sun. Color + Temperature = Length of life Blue and white are the brightest Yellow stars last 10 billion years Red stars last longer It then turns into a super giant or red giant. TEMPERATURES This slide: http://library.thinkquest.org/J002231F/Stars/thetemperatureofthestars.htm

5 This picture: http://english.turkcebilgi.com/Spectral+classification ALL THREE

6 (1880-1920) Originally measured by Hydrogen-line Intensities A – P (1920s) Development of Atomic Theory Reclassification by Surface Temperature O B A F G K M SPECTRAL CHARACTERISTICS This slide: Astronomy Today textbook This picture: http://english.turkcebilgi.com/Spectral+classification

7 Classifying stars according to color, temperature, and spectral classifications:  Explains Our Universe  Determines the Building Blocks of the Solar System  Determines the Life of Stars Determines our Eminent Doom THE ANSWER


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