astronomy unit
English Thesaurus
1. a linear unit used for astronomical distances (noun.quantity)
hyponym | : | light year, light-year, |
definition | : | the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers (noun.quantity) |
hyponym | : | light hour, |
definition | : | the distance light travels in a vacuum in one hour; approximately one billion kilometers (noun.quantity) |
hyponym | : | light minute, |
definition | : | the distance light travels in a vacuum in one minute; approximately 18 million kilometers (noun.quantity) |
hyponym | : | light second, |
definition | : | the distance light travels in a vacuum in one second; approximately 300,000 kilometers (noun.quantity) |
hyponym | : | astronomical unit, au, |
definition | : | a unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers) (noun.quantity) |
hyponym | : | parsec, secpar, |
definition | : | a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years (noun.quantity) |
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