Question

what is a lightyear.​

Answer 1

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, it can travel about 10 trillion km. More p recisely, one light-year is equal to 9,500,000,000,000 kilometers.

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Answer 2

the year in which february has 29 days and the year has 366 days that year is