... 24.12.1998 . ... Ring Around the Galaxy . ... By chance, a collision of two galaxies has created a surprisingly recognizable shape on a cosmic scale - "The Cartwheel Galaxy". The Cartwheel is part of a group of galaxies about 500 million light years away in the constellation Sculptor (two smaller galaxies in the group are visible on the right). ... This dramatic premier three-dimensional visualization of Mars' north pole is based on elevation measurements made by an orbiting laser. ... 1997 1998 . ...