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The star nearest to our sun is Proxima Centauri, at a distance of 4.3 light-years from the sun. How far away, in kilometers, is Proxima Centauri from the sun?

Answer :

Answer: [tex]4.068(10)^{13} km[/tex]

Explanation:

A light year is a unit of length and is defined as "the distance a photon would travel in vacuum during a Julian year at the speed of light at an infinite distance from any gravitational field or magnetic field.
"


In other words: It is the distance that the light travels in a year.


This unit is equivalent to [tex]9.461(10)^{12}km[/tex], which mathematically is expressed as:

[tex]1Ly=9.461(10)^{12}km[/tex]

Doing the conversion:

[tex]4.3Ly.\frac{9.461(10)^{12}km}{1Ly}=4.068(10)^{13}km[/tex]

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Rewritten by : Barada

The Answer: The star closest to our sun is 4.2 light years away from the sun.

Explanation: