Astronomy Picture of the Day . ... Roll Cloud Over Wisconsin . ... These rare long clouds may form near advancing cold fronts. ... This cosmic snapshot composed with image data from NASA's Wide-field Infrared Survey Explorer (WISE) satellite captures a multitude of faint stars and distant galaxies toward the constellation Lyra at wavelengths longer than visible light. ... A Jet from Galaxy M87 . ... What's causing a huge jet to emanate from the center of galaxy M87? ... Hurricane Irene Forms . ...