Question
Why do astronomers use astronomical units (AU) instead of kilometers (km)?(1 point)
Responses
There are no km in outer space, only AU.
There are no km in outer space, only AU.
AU is used in astronomy, while km is used in physics.
AU is used in astronomy, while km is used in physics.
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 for spacing, while km is used for length.
Responses
There are no km in outer space, only AU.
There are no km in outer space, only AU.
AU is used in astronomy, while km is used in physics.
AU is used in astronomy, while km is used in physics.
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 for spacing, while km is used for length.
Answers
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