GODDARD 4,000th Comet Discovered by ESA & NASA Solar Observatory by NASA, Aliens & KouroshJune 17, 2020 On June 15, 2020, a citizen scientist spotted a never-before-seen comet in data from the Solar and Heliospheric Observatory, or SOHO — the 4,000th comet discovery in the spacecraft’s 25-year history. Source:: Goddard Related