| 单词 | light-year |
| 释义 | light-year (once / 18073 pages) n WORD FAMILY light-year: light-years USAGE EXAMPLESWe now ascertain that the observable universe exceeds 90 billion light-years across. New York Times(Dec 26, 2016) The first signal was generated by the collision of two black holes more than a billion light-years from Earth. BBC(Dec 13, 2016) Light from a lonely neutron star 400 light-years away is polarized, just like light reflecting off a pond, a team of astronomers reports. Science Magazine(Nov 30, 2016) n the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers Syn|Hyper light year astronomy unit a linear unit used for astronomical distances |
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