3,000th Comet Spotted by Solar and Heliospheric Observatory (SOHO) On Sept. 13, 2015, the Solar and Heliospheric Observatory – a joint project of the European Space Agency and NASA — discovered its 3,000th comet, cementing its standing as the greatest comet finder of all time. Prior to the 1995 launch of the observatory, commonly known as SOHO, only a dozen or so comets had ever even been discovered from space. via NASA http://ift.tt/1LeIwbW