aurigae b (or ab aur b) is a protoplanet in the protoplanetary disk of the star ab aurigae. the star is about 505 lightyears from earth. it is a young star, about two million years old. the star and everything in its system are in its early stages. in this growing solar system, astronomers can see the formation of the new gas giant. they can learn if the theories they have created about how stars are formed are correct.