How is the distance between Earth and Mars at closest approach most easily determined when using AUs?
Answer
By simple subtraction ($1.52 ext{ AU} - 1.00 ext{ AU}$).
When using AUs, the distance between planets can be found by simply subtracting their respective average orbital distances, which is significantly easier than working with millions of kilometers.
#Videos
AU and Light Years Explained - How we measure space - YouTube
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