Name two units of length which are bigger than a metre. How are they related to the metre?

The units of length which are bigger than a metre are —

1. Astronomical Unit (A.U.) — One astronomical unit is equal to the mean distance between the earth and the sun. Relation between metre and astronomical unit is expressed as:
       A.U. = 1.496 x 10¹¹m
2. Light year (ly) — A light year is the distance travelled by light in vacuum, in one year. Relation between metre and light year is expressed as:
       1 light year = 9.46 x 10¹⁵m