Light-year

What is a light-year and how is it used?

A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, one light-year is equal to 9,500,000,000,000 kilometers

A unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607×10 12 km (nearly 6 million million miles).