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Why are stars different colors?
Question
#14937. Asked by ducky.
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Gnomon
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Because they burn at different temperatures. Red stars are the coolest, yellow are hotter, blue stars are the hottest of all.
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Brainy Blonde
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Why do stars appear to change color? It's due to turbulence in the atmosphere. It's just like how things look wavy when you look over a hot grill in the summer, only on a smaller scale. An even better analogy is that looking at stars from inside our atmosphere is like bird watching from the bottom of a swimming pool: the ripples distort the picture. That's one of the main reasons why space telescopes, like Hubble, provide such sharp pictures. In addition to contributing turbulence, the atmosphere also acts like a prism when you look at stars near the horizon. Since the star colors get split into a rainbow plus the turbulence makes the star move around, it can appear like the star is changing color. See: http://www.astro.wisc.edu/tildedolan/constellations/extra/faq.html The colour of a star is determined by its temperature, the hottest stars are blue and the coolest stars are red. The Sun has a surface temperature of 5,500 degrees Celsius, its colour appears yellow. See: http://www.astro.keele.ac.uk/workx/starlife/StarpageS_26M.html There ya go!!!!
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