Astronomy Picture of the Day . Ice Clouds over Mars . ... Mars has clouds too. The above true color image taken in August by Mars Pathfinder shows clouds of ice high in the Martian atmosphere. ... Their sudden disappearance 65 million years ago, along with about 70 percent of all species then living on Earth, is known as the K-T event (Cretaceous-Tertiary Mass Extinction event). ... Floating Free in Space . ... The Brightest Star Yet Known . ... In the Center of 30 Doradus . ...