The globular cluster M13 is a cluster of old stars, which over time have been linked by the force of gravitational attraction.

It is a cluster with a radius of 73 light years and is located at a distance of 25.100 light years from Earth.

A light year es a unit of lenght used by astronomers to locate elements in the universe.

Is the distance light travels in one year.

Therefore, it is considered:

one light year = kilometers