Question

light year is a unit of measuring time?​

Answer 1

Explanation:

The light-year is a unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometres (9.46×1012 km) or 5.88 trillion miles (5.88×1012 mi).[note 1] 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).[2] Because it includes the word "year", the term light-year may be misinterpreted as a unit of time.[3]

Light-year

12lightyears.gif

Map showing the stars that lie within 12.5 light-years of the Sun[1]

General information

Unit system

astronomy units

Unit of

length

Symbol

ly[2] 

Conversions

1 ly[2] in ...

... is equal to ...

metric (SI) units

9.4607×1015 m

9.4607 Pm

imperial & US units

5.8786×1012 mi

astronomical units

63241 au

0.3066 pc

The light-year is most often used when expressing distances to stars and other distances on a galactic scale, especially in non-specialist and popular science publications.[3] The unit most commonly used in professional astrometry is the parsec (symbol: pc, about 3.26 light-years; the distance at which one astronomical unit subtends an angle of one second of arc).[2]

Answer 2

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A light-year is a unit of distance, not time.

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