Which of the following units is suitable for measuring distances outside the solar system, say the distance of pole star from Earth?

Astronomical unit

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Light year

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Either astronomical unit or light year

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None of these

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Solution

The correct option is B
Light year

Although the astronomical unit is fine for our solar system, it is not sufficient to designate the greater distances to other stars and galaxies. Instead, the light year is used as a unit of measurement.

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Similar questions

Which of the following units is used to measure distances within the solar system?

The appropriate unit for measuring the distance of stars from the earth is:

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