light second


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Related to light second: light minute, Light-day
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Noun1.light second - the distance light travels in a vacuum in one second; approximately 300,000 kilometers
astronomy unit - a linear unit used for astronomical distances
light year, light-year - the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers
References in periodicals archive ?
Tenders are invited for Electric maintanance of street light second call
5 light seconds from the earth to the moon and 8 light minutes from the earth to the sun.
Police Constable Fabian Wright, 28, was speeding and ran a red light seconds before his Audi crashed into a Ford Ka, killing 16-year-old passenger Lisa-Marie Wyllie.