astronomy unit a linear unit used for astronomical distances
light hour the distance light travels in a vacuum in one hour; approximately one billion kilometers
light minute the distance light travels in a vacuum in one minute; approximately 18 million kilometers
= synonym
= antonym
= relatert ord
Wiktionary
Substantiv
light year -
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.
light year -
In plural light years; figurative, informal A very long way.
light year -
In plural light years; figurative, informal, nonstandard A very long time.
