Glossary – Light-year
A unit for measuring distance.1 light-year is about equivalent to 9 trillion km.This unit of measurement is called 'light-year' because it is the distance that light can travel during one…
A unit for measuring distance.1 light-year is about equivalent to 9 trillion km.This unit of measurement is called 'light-year' because it is the distance that light can travel during one…
