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How many AU is the nearest star from earth?

Answer 1

Ivy Allen

#~~267# thousand AU

Proxima Centauri is 4.23 light-years away from us, if we ignore the Sun, which is located at a distance of 1 AU.

4.23 light-years correspond to:

#4.23 year xx 365*24*60*60 (seconds)/year xx 300000 (km)/(second)#

#=4.0xx10^13 km#

#1 AU=1.496xx10^8 km#

Thus, Proxima Centauri's distance in astronomical units is

#=(4.0xx10^13)/(1.496xx10^8)#

#~~267# thousand AU

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Answer 2

Hunter Arthur

Proxima Centauri, the star closest to Earth, is located roughly 268,770 astronomical units (AU) away.

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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.