Definition of "lightyears" []

• Plural form of lightyear. (noun)

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• "The problem with 20 lightyears is that it's, well, a pretty large number of years."
• "“We have detected the presence of the naphthalene cation in a cloud of interstellar matter located 700 lightyears from the Earth”, says IAC researcher Susana Iglesias Groth."
• "Fermi is located more than 2220 lightyears from the center of the galaxy."