... Starbirth in NGC 1808 . ... The center of galaxy NGC 1808 is bursting with new stars, but why? Being a barred spiral galaxy makes NGC 1808 somewhat similar to our own Milky Way Galaxy. But the disk of NGC 1808 (inset) is quite warped, and its center is unusually bright and blue. ... Sunspots are about the size of the Earth and frequently occur in groups, as shown above. ... Mars: Ridges Near the South Pole . ... Clouds Over Tharsis on Mars . ... When and where do clouds form on Mars? ...