What Is A Light Year Definition

The light year is a unit of length used to express astronomical distances and measures about 9 46 trillion kilometres 9 46 x 10 12 km or 5 88 trillion miles 5 88 x 10 12 mi.

What is a light year definition. Light year definition is a unit of length in astronomy equal to the distance that light travels in one year in a vacuum or about 5 88 trillion miles 9 46 trillion kilometers. The definition of a light year is the unit for measuring the distance that light travels in one year or is a long time or a great distance. A light year is a measurement of distance and not time as the name might suggest. The distance that light travels in a vacuum in one year approximately 9 46 trillion kilometers.

As defined by the international astronomical union iau a light year is the distance that light travels in vacuum in one julian year 365 25 days. An example of a light yea. That is a 6 with 12 zeros behind it. One light year is about 6 trillion miles 9 trillion km.

Noun an example of a light year is over five trillion miles. When we use powerful telescopes to look at distant objects in space we are actually looking back in time. Often light years informal a long. How can this be.

The distance that light travels in one year about 9 5 million million kilometres 2. A light year is the distance a beam of light travels in a single earth year or 6 trillion miles 9 7 trillion. Used as a unit in measuring stellar distances. Because it includes the word year the term light year may be.

Meaning pronunciation translations and examples. Light travels at a speed of 186 000 miles. Looking back in time. A light year is the distance that light travels in a year.

Light year definition the distance traversed by light in one mean solar year about 5 88 trillion mi.