Question

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

Answer 1

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

Step-by-step explanation:

Answer 2

Answer:
`4.068(10)^(13) km`

Step-by-step 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
`9.461(10)^(12)km`, which mathematically is expressed as:

`1Ly=9.461(10)^(12)km`

Doing the conversion:

`4.3Ly.(9.461(10)^(12)km)/(1Ly)=4.068(10)^(13)km`