Astronomy Picture of the Day . The Galactic Center Across the Infrared . ... The center of our Galaxy is obscured in visible light by dark dust that rotates with the stars in the Galactic Plane. ... Comet C/1999 S4 LINEAR is rapidly approaching both the Earth and the Sun from the outer Solar System, and should be at its brightest around 2000 July 25 in the early evening sky of northern observers. ... This false color picture shows how the Earth glows in ultraviolet (UV) light. ...