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Why are astronomical units necessary?

Updated: 9/22/2023
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11y ago

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Because it would be impractical (very large numbers) to use kilometers, miles, or meters to measure distances in our solar system. This unit of measurement is used as it allows for comparisons to be done with relative ease, and all distances can be standardized. For this same reason when talking about anything outside of the solar system, light-years are used as the distances become drastically larger and too much for AUs to handle.

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Q: Why are astronomical units necessary?
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How far from the sun is all the plants?

Mercury--0.387 astronomical units Venus--0.723 astronomical units Earth--1.0 astronomical units Mars--1.524 astronomical units Jupiter--5.203 astronomical units Saturn--9.529 astronomical units Uranus--19.19 astronomical units Neptune--30.06 astronomical units Pluto--39.53 astronomical units Please note that these are all mean distances, and the actual distance will vary as to the location of the specific planet in its specific orbit.


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1.93 astronomical units is 288,723,890 kilometers.


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0.82 astronomical units is 122,670,254 kilometers.


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29 astronomical units = 4,338,338,250 kilometers.


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38 astronomical units is about 5,684,719,086 kilometers.


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