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Comets’ heads can be green, but never their tails. After 90 years, we finally know why

December 20, 2021

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A study has solved a 90-year-old mystery by proving the mechanism by which dicarbon -- the chemical that makes some comets' heads green -- is broken up by sunlight. This explains why the vibrant green color never reaches the comet's tail.

from Top Technology News -- ScienceDaily https://ift.tt/3yKnT4F

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Comets’ heads can be green, but never their tails. After 90 years, we finally know why

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