Kordylewski cloud
Kordylewski searched for clouds of dust at the Lagrange points in 1951. He first saw them in 1956. He then succeeded in photographing two bright patches near the L5 Lagrange point in between 6 March 1961 to 6 April 1961. J. Wesley Simpson observed the clouds in 1967 using the Kuiper Airborne Observatory, and in 2018, the Royal Astronomical Society confirmed their existence. However, the Japanese Hiten space probe did not find the clouds in 1992, although this does not mean they are not there.