ExploraTour: A Peek into the Lives of the Stars
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Image from the Hubble Space Telescope, reproduced with permission from AURA/STScI.
The Colors of the Night Sky
This is an image of the supergiant star, Betelgeuse, taken by the Hubble Space Telescope. Look closely at this image. Betelgeuse is not yellow like our sun, but is very red in color.
Many people are surprised by this.
The sun and Betelgeuse are both made mostly of a gas called hydrogen so why are they different colors?