what is galaxy and light years?
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A light year is the distance light travels in one Earth year.A galaxy is a huge collection of gas,dust and billions of stars and their solar system.A galaxy is held together by gravity.
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A Galaxy is huge collection of stars,clouds of dust and other gases.
A Light year is the dxistance travelled by light in 1 year at a speed of 2,99,792.5 km per second.
Explanation:
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