Delphinus is a pretty name for a group of stars that are shaped like a little dolphin jumping out of the water. The stars look like they're connected to create the shape of this friendly sea creature. Some people like looking at the stars and creating pictures in their minds with the way the stars are placed in the sky. Delphinus is one of these pictures that someone made up a long time ago. So now when people look at the sky, they can say they see a dolphin swimming and jumping in the stars!