GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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year light
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light year
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lightyear
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none of the above
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Detailed explanation-1: -Light-year is the distance light travels in one year. Light zips through interstellar space at 186, 000 miles (300, 000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.
Detailed explanation-2: -A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (9.46×1012 km), or 5.88 trillion miles (5.88×1012 mi).
Detailed explanation-3: -A light-year is defined as the total distance travelled by light in one year. The value of one light-year can be calculated by multiplying the speed of light and the total time taken by the light in one year. Proxima Centauri is the nearest star at a distance of 40, 000, 000, 000, 000 km from the Earth.