Photo of Orion Belt with the stars Alnitak, Alnilam and Mintaka. The color picture was composited from digitized black and white photographic plates recorded through red and blue astronomical filters, with a computer synthesized green channel. The plates were taken using the Samuel Oschin Telescope, a wide-field survey instrument at Palomar Observatory, between 1987 and 1991. – Davide De Martin skyfactory.org

Related channels: ASTRONOMY, GALAXIES, NEBULAE, JUPITER, SATURN, THE MOON