light year inMeasurement topic From Longman Dictionary of Contemporary Englishˈlight yearnoun[countable]1thedistancethat lighttravelsin one year, about 9,460,000,000,000kilometres, used formeasuringdistances betweenstarsa star 3,000 light years from Earth2→light years ahead/better etc than somethi...
Definition: Light-yearA light year, abbreviated ly, is the distance light travels in one year: roughly 9.46 × 1012 kilometres (9.46 petametres, or about 5.88 × 1012 (nearly six trillion) miles). More specifically, a light year is defined as the distance that a photon would travel, in ...
(Units) a unit of distance used in astronomy, equal to the distance travelled by light in one year, i.e. 9.4607 × 1012kilometres or 0.3066 parsecs Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.A light-year or light year is a unit of length, equal to just under 10 trillion kilometres. As defined by the International Astronomical Union (IAU), a light-year ...
The speed of light is 2.9979 × 10^5 kilometres per second.(1) Show that one light year is 9.461 × 10^(12) km, correct to 4 significant figures 相关知识点: 试题来源: 解析 一光年是指光在一年(365.25 天)中传播的距离。 首先,计算一年的秒数:365.25 天/年 * 24 小时/天 * 60 分钟/...
Definition: Light-yearA light year, abbreviated ly, is the distance light travels in one year: roughly 9.46 × 1012 kilometres (9.46 petametres, or about 5.88 × 1012 (nearly six trillion) miles). More specifically, a light year is defined as the distance that a photon would travel, in ...
light year 释义 light year noun[C] uk /ˈlaɪt ˌjɪər/ us /ˈlaɪt ˌjɪr/ thedistancethatlighttravelsin oneyear(about 9.5 million millionkilometres)光年(指光1年走过的距离,约为9.5兆公里) SMART Vocabulary: related words and phrases Years & yearly academic year ad Anno ...
Light Year Conversion Table Kilometres 9,460,528,404,847 Miles 5,878,499,812,499 Astronomical Units 63,240 Parsecs 0.3066 Because a light year is directly related to the time light takes to travel through space, it follows that we look out into the universe we also look back in time. Fo...
复数:light-years 权威英汉双解 英汉 英英 网络释义 light-year 显示所有例句 n. 1. 光年(指光在一年中走过的距离:9.4607 × 10 12 公里)the distance that light travels in one year, 9.4607 × 10 12 kilometres 2. [pl] 很长时间;很久a very long time ...
Units of length in the metric SI system are based on multiples or fractions of a meter. There are measurements of length/distance in the metric SI system greater than a kilometer that can be expressed in terms of kilometres.1 km is equivalent to 0.621371 mi. The kilometer is unit of lengt...