LIGHTYEAR

Light-year

A light-year, sometimes written light year, lightyear, or Light-year is an astronomical unit of length equal to just under 9.5 trillion kilometres . As defined by the International Astronomical Union, a light-year is the distance that light travels in vacuum in one Julian year.

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Lightyear

Lightyear were a UK 7-piece ska punk band. They formed in 1997 in Derby, England.

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light year

Noun

  1. A unit of length (abbreviation ly; equal to just under 10 trillion kilometres (1016 metres)) equal to the distance light travels in one Julian year; used to measure extremely large distances.
  2. (in plural light years; figurative, informal) A very long way.
    The marathon runner in the lead is light years ahead of the one at the back.
  3. (in plural light years; figurative, informal, nonstandard) A very long time.
    Some of Leonardo da Vinci’s inventions were light years ahead of their time.


The above text is a snippet from Wiktionary: light year
and as such is available under the Creative Commons Attribution/Share-Alike License.

lightyear

Noun



The above text is a snippet from Wiktionary: lightyear
and as such is available under the Creative Commons Attribution/Share-Alike License.

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