UNIVERSE
SOLAR STRUCTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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time
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mass
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distance
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brightness
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Detailed explanation-1: -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.
Detailed explanation-2: -A light year is the distance light travels in a year. Light moves super-fast, so that’s a really big distance. One light year is almost six trillion miles. And an astronomical unit is the average distance between the earth and the sun.
Detailed explanation-3: -The Light Year is fine for measuring distances to stars or other galaxies but not for measuring distances within our own solar system. An object 35 AU from Earth would only be a few thousandths of a Light Year away. Thus the Light Year is just not a practical unit for our solar system.