GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The unit of measurement for distances OUTSIDE the solar system is a ____
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Astronomical Unit
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Light-year
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kilometer
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Apparent Magnitude
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Explanation:
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: -Many astronomical objects like stars or galaxies are very far away from the earth & giving their distances in the kilometres unit becomes very inconvenient. Light-year is a large unit and equals the distance travelled by light in one year. Hence, the large distances are expressed in light-years.
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