... It is still not known why the Sun's light is missing some colors. ... This gorgeous color deep-sky photograph visits two such lovely sights, cataloged by the 18th century cosmic tourist Charles Messier as M8 and M20. ... Slung below its equally innovative mothership dubbed White Knight, SpaceShipOne rides above planet Earth, photographed during a recent flight test. ... In the center of star-forming region 30 Doradus lies a huge cluster of the largest, hottest, most massive stars known. ...