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 for spacing, while km is used for length. AU is used for spacing, while km is used for length. 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.
1 answer
The correct response is: Large distances are easier to express in AU than in km.
Astronomical units provide a more convenient scale for measuring distances within our solar system, as the vast distances between celestial bodies can result in very large numbers when using kilometers. Using AU simplifies these measurements and makes them easier to understand and compare.
