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Why do astronomers use astronomical units (AU) instead of kilometers (km)?(1 point)
Responses
AU is used for spacing, while km is used for length.
AU is used for spacing, while km is used for length.
There are no km in outer space, only AU.
There are no km in outer space, only AU.
Large distances are easier to express in AU than in km.
Large distances are easier to express in AU than in km.
AU is used in astronomy, while km is used in physics.
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None of the provided responses accurately explain why astronomers use astronomical units (AU) instead of kilometers (km).
The correct answer is: Large distances within the Solar System are easier to express in AU than in km. The astronomical unit (AU) is a unit of length that is approximately the average distance between the Earth and the Sun, which is about 150 million kilometers. As distances within the Solar System can be very large, using AU provides a more convenient and manageable scale for expressing these distances compared to using kilometers.
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