A light-year is the distance that light travels in a vacuum in one Julian year (365.25 days). It's a unit of astronomical distance.

A micrometer, also known as a micron, is a unit of length equal to one millionth of a meter. It's commonly used to measure microscopic objects.

While not a common practical conversion for everyday use, this conversion helps to grasp the immense scale of the universe by expressing vast astronomical distances in a familiar (though extremely small) unit, emphasizing the sheer number of micrometers in even half a light-year.

0.5 light-year is equal to 4.7305e+21 micrometers.