... Red Sprite Lightning with Aurora . ... The Red Rectangle Nebula from Hubble . ... Blue Sun Bursting . ... Once the famous sunset comet, PanSTARRS (C/2011 L4) is now visible all night from much of the northern hemisphere, bound for the outer solar system as it climbs high above the ecliptic plane. ... Four X-class Flares . ... Swinging around the Sun's eastern limb on Monday, a group of sunspots labeled active region AR1748 has produced the first four X-class solar flares of 2013 in less than 48...