Click on image for full size
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
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