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, while some 900 had been discovered from the ground.
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, while some 900 had been discovered from the ground.
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