Light-Year
A light year is a unit of distance used in astronomy to express how far light travels in one year. Light moves incredibly fast, at about 299,792 kilometers per second (approximately 186,282 miles per second). In one year, this means light travels about 9.46 trillion kilometers (about 5.88 trillion miles). Because space is vast, using light years helps convey the great distances between stars and galaxies in a more comprehensible way. For instance, Proxima Centauri, the closest star to Earth, is about 4.24 light years away, indicating how far light travels in 4.24 years.
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A light year is a unit of distance that measures how far light travels in one year. Since light moves incredibly fast—about 299,792 kilometers per second (or roughly 186,282 miles per second)—it covers nearly 9.46 trillion kilometers (about 5.88 trillion miles) in a year. This measurement is often used in astronomy to express distances between stars and galaxies, helping us understand the vastness of the universe. For example, if a star is said to be 10 light years away, it means the light we see from that star has taken 10 years to reach us.
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A light-year is a unit of distance that represents how far light travels in one year. Since light moves incredibly fast, about 299,792 kilometers (or 186,282 miles) per second, a light-year equals about 9.46 trillion kilometers (or about 5.88 trillion miles). This measure is used in astronomy to express distances between stars and galaxies, making it easier to comprehend the vastness of space. For example, when we say a star is 4 light-years away, it means the light from that star takes four years to reach us.