... An Energetic Radio Galaxy . ... The black indentation to the red emission nebula seen just to the right of center of the above photograph is one of the most famous features in any nebulae on the sky. ... Mimas: Small Moon with A Big Crater . ... Mimas is one of the smaller moons of Saturn but shows one of the largest impact craters! ... Titan is the only one of Saturn's moons with an atmosphere, and one of only two moons in the Solar System with this distinction (Neptune's Triton is the other). ...