How big is a light-year? Light travels at nearly 300,000 km per second, and even then, the distances it covers are mind-bending. In just 1 nanosecond, light moves 30 cm. In 1 millisecond, it travels 300 km. In 1 second, it covers 300,000 km, almost the distance to the Moon. In 1 minute, it moves 18 million km. In 1 hour, 1.08 billion km. In 1 day, 25.9 billion km. And in 1 year, a staggering 9.46 trillion kilometers. That distance is called one light-year. To put it simply, light can circle Eart
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How big is a light-year? Light travels at nearly 300,000 km per second, and even then, the distances it covers are mind-bending. In just 1 nanosecond, light moves 30 cm. In 1 millisecond, it travels 300 km. In 1 second, it covers 300,000 km, almost the distance to the Moon. In 1 minute, it moves 18 million km. In 1 hour, 1.08 billion km. In 1 day, 25.9 billion km. And in 1 year, a staggering 9.46 trillion kilometers. That distance is called one light-year. To put it simply, light can circle Eart
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