We find out that earth is not the center of the universe and from the 17th century that the Sun is not the center of our galaxy (Milky Way). Today we know that our galaxy is part of a growing universe with billions of galaxies, containing billions of Suns (Stars).
The images after the jump explain our place in the universe with a very easy way.
“Knowledge of Earth’s location in the universe has been shaped by 400 years of telescopic observations, and has expanded radically in the last century. Initially, Earth was believed to be the center of the universe, which consisted only of those planets visible with the naked eye and an outlying sphere of fixed stars. After the acceptance of the heliocentric model in the 17th century, observations by William Herschel and others showed that the Sun lay within a vast, disc-shaped galaxy of stars, later revealed to be similar to our own. By the 20th century, observations of spiral nebulae revealed that our galaxy was only one of billions in an expanding universe, grouped into clusters and superclusters.”