... 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! ... On July 20th, 1969, a human first set foot on the Moon. ... The Small Cloud of Magellan . ... The Magellanic Clouds are small irregular galaxies orbiting our own larger Milky Way spiral galaxy. ...