SciShow Space

SciShow Space

Why Don't Comets Ever Have a Green Tail? (2022x4)


Air date: Jan 25, 2022

There’s no question that comets have been regarded as some of the most beautiful things in the night sky for thousands of years. But why are their heads often green but never their tails?

  • Premiered: Apr 2014
  • Episodes: 878
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