The unmissable yellow-brick cylinder at the foot of Sankt Jorgen's Lake is the Tycho Brahe Planetarium, named after a 16th-century astronomer who first cataloged the solar system. The main attraction here is the 3D IMAX screen in the Space Theatre, an experience that is much enjoyed by children, and hosts regular viewings of space-themed educational movies. Admission is 139 DKK for adults, 94 DKK for children.