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An astronomer writes a distance as 5 AU. One AU is the distance from the Sun to:
ANeptune
BMercury
CJupiter
DEarth
Answer & Solution
Correct answer: D. Earth
1. The unit is set by our own orbit.
2. It measures the Sun to our planet.
3. It is the distance to Earth.
_Source: OpenStax Astronomy 2e, Chapter 7, Other Worlds: an Introduction to the Solar System._
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