Physics, 05.05.2021 01:00 alvarezmrs1913
An astronomer is observing a star which puzzles her. The lines in the star's spectrum indicates that the star is very hot and should therefore be blue. But the star looks reddish in photographs and in measurements of the continuous spectrum. What is one possible explanation of this puzzle?
Group of answer choices
this star is surrounded by an HII region
this star is in a local bubble, just like the Sun
this star must be located high above the disk of the Milky Way Galaxy
the star is no longer undergoing nuclear fusion inside
we are seeing the light of the star through layers of interstellar dust
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