The nearest star to our Sun is Proxima Centauri, which is about 4.24 light-years away.

Here's the breakdown:

* Light-year: A light-year is the distance light travels in one year.

* Speed of light: Light travels at approximately 299,792,458 meters per second (186,282 miles per second).

Therefore, it would take 4.24 years for light to travel from Proxima Centauri to Earth.