(6). The distance travelled by light in our year
(1). Satellite
(2). Galaxy
(3). Light year
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Light-year is the answer.
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 precisely, one light-year is equal to 9,500,000,000,000 kilometers.
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