star type


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star type

Stars are often referred to in terms of their color (red, orange, yellow, blue, white), comparative size (dwarf, giant, supergiant), and brightness. Blue and white stars are hotter than the yellow Sun; orange and red stars are cooler. Here are some examples of star types: 1 Sirius B A white dwarf: diameter 100 times smaller than the Sun’s. 2 Barnard’s Star A red dwarf: diameter 10 times smaller than the Sun’s. 3 Sun A yellow dwarf. 4 Capella A yellow giant: diameter 16 times larger and brightness 150 times greater than the Sun’s. 5 Rigel A blue-white giant: diameter 80 times larger and brightness 60,000 times greater than the Sun’s. 6 Betelgeuse A red supergiant: diameter 300—400 times larger and brightness 15,000 times greater than the Sun’s.
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