What is Earth's diameter size in Astronomical Units? What is the best unit for Earth? Also, what is Earth's size in light-year?

Answer 1

Earth's diameter = 12756 km = 8.5269 E-04 AU = 1.35 E-09 LY. Best unit for size of space bodies is km or mile. .

1 light year (LY) = 6.29 E+04 AU. The International Astronomical Union (IAU) defines AU as 149597870.7 km. All significant digits (sd) in size may be exact for angle measurements, but this may not be the case for larger units like LY.

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Answer 2

Lydia Allen

The Earth's diameter is approximately 12,742 kilometers. Astronomical Unit (AU) is not a suitable unit for Earth's size. The most appropriate unit for Earth's size is kilometers. Earth's size in light-years is about 0.000001072 light-years.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.