Copernicus

Copernicus is a Sun Badge you receive for completing 200 mastery skills. This badge was introduced in 2011. The badge has recently been retired and recreated with the Summer 2013 Khan Academy Update. So users who joined before the Learning Dashboard come out would get double points if they had this badge before the update.

How to earn it
To earn it, you have to have mastered any 200 unique skills. When earned, it will give you 80,000 free energy points.

Trivia

 * After the learning dashboard was added, they retired the old version of this badge and made a new one. Because of this, it is possible to obtain two copies of this badge: One retired, one current.

Check out some other sun badges:

 * Magellan
 * Kepler
 * Sally Ride

Named For
This badge was named for Nicolaus Copernicus. In the early 1500s, when virtually everyone believed Earth was the center of the universe, Polish scientist Nicolas Copernicus proposed that the planets instead revolved around the sun. Although his model wasn't completely correct, it formed a strong foundation for future scientists to build on and improve mankind's understanding of the motion of heavenly bodies.

Indeed, other astronomers built on Copernicus’ work and proved that our planet is just one world orbiting one star in a vast cosmos loaded with both, and that we’re far from the center of anything.

Read more about Nicolaus Copernicus.