light year


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light year

the distance light travels in one year, i.e. 5.9 x1012 miles.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
The nebula, in the Taurus constellation, is a remnant of a supernova explosion more than 900 million years ago and it measures 10 light years across.
The 27,000 light years to the galactic center on our BB-sized solar system scale is more than 40 miles.
FOR the first time, astronomers have detected light from planets hundreds of light years beyond the Solar System.