Why do astronomers use light years to measure distances in space?

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asked Sep 26, 2018 78.3k views

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Tobias Domhan · Answer 1 · 2018-10-01T01:23:55+0000

The distances are so great and vast that they need a large measurement to easier express the distances. They use Astronomical Units (AUs) for distances within our solar system.

Why do astronomers use light years to measure distances in space?

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