The Feeling’s Mutual

Dione slips behind Rhea in this animation made from 19 raw images taken by the Cassini spacecraft on January 20, 2011. Called a mutual event, the two moons seem to just miss each other – even though in reality they are separated by over 93,400 miles! Rhea and Dione are similar in composition and size,….

Fear and Dread

The European Space Agency’s Mars Express has captured footage of Mars’ two tiny moons, Phobos and Deimos, passing each other in what is known as a “mutual event”. Although the moons themselves are in no special positions the images are noteworthy, being the first time the moons have been photographed passing each other. Mars Express’…