Question

If the distance to the nearest star is 4.2 light-years, how far away is it in AU?

Answer 1

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Proxima Centauri, the closest star to our own, is still 40,208,000,000,000 km away. (Or about 268,770 AU.) When we talk about the distances to the stars, we no longer use the AU, or Astronomical Unit; commonly, the light year is used