UDF SkyWalker V1.0. Astronomy Picture of the Day. Discover the cosmos!
Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2016 April 15 Mercury and Crescent Moon Set Image Credit & Copyright: Miguel Claro (TWAN, Dark Sky Alqueva) Explanation: Innermost planet Mercury and a thin crescent Moon are never found far from the Sun in planet Earth's skies. Solar System Scope. Constellations of the Sky. The Size Of Our World. APOD - Astronomie - Weltraumbild des Tages.