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Published byMyron Carson Modified over 9 years ago
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Fiona Ward Emily Linden
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“Explain the usefulness of classifying stars according to their colors, surface temperatures, and spectral characteristics.” THE QUESTION
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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
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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
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This picture: http://english.turkcebilgi.com/Spectral+classification ALL THREE
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(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
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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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