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...
1. the distance that light travels in a vacuum in 1 year5.88 trillion miles or 9.46 trillion kilometers Synonym: light year近义词 临近词 light year光年 相关列句 It's about 2 light-years long and half a light-year wide. It's located about 2, 000 light years away in the direction ...
19. A light-year is about 6 trillion miles, the distance light travels in a year. 一光年大约6百亿亿英里,即光行走一年的距离。 20. 20. The observable universe grows by a light-year every year as light from farther away has time to reach us. ...
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 ...
25K Learn how fast light travels and find the speed of light in meters or miles per second. Understand the significance of light-years and lookback time with examples. Related to this QuestionHow many meters are there in 1.00 light-year? How many light years are in an astronomical unit?
light year to faustDefinition: 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...
It is made up of electromagnetic waves that travel at a speed of about 186,282 miles (299,728 kilometers) per second. 2. Electromagnetic energy that cannot be perceived by the human eye, as infrared light and ultraviolet light. See Note at electromagnetic radiation. The American Heritage®...
Related to speed of light:light year,E=mc2 ThesaurusAntonymsRelated WordsSynonymsLegend: Switch tonew thesaurus Noun1. speed of light- the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 me...
adjacentto the visible band are often referred to as light also,infraredat the one end andultravioletat the other. Thespeed of lightin avacuumis a fundamentalphysical constant, the currently accepted value of which is exactly 299,792,458 metres per second, or about 186,282 miles per second....
"To obtain an idea of the size of a light-year, take the circumference of the Earth (24,900 miles), lay it out in a straight line, multiply the length of the line by 7.5 (the corresponding distance is one light-second), then place 31.6 million similar lines end to end," NASA's ...