Cosmic Perspectives from Amid the Stars:
Astronomy Blog

The true size of the universe boggles the mind. It’s so large that it is simply impossible to truly grasp its size. Even light, which travels faster than anything else, takes time to travel through space. For light, it’s eight minutes from the Sun to Earth, four years to the closest star, and a hundred thousand years to cross the Milky Way. To truly appreciate these vast distances, a scale model is necessary.