Ancient Sumerian
Cylinder Seal clearly shows Pluto
8,000 years ago.
Pluto wasn't confirmed to be discovered' until photographed by Western scientists in 1930.
On February 18, 1930, after nearly a year of searching, Tombaugh discovered a possible moving object on photographic plates taken on January 23 and 29. A lesser-quality photograph taken on January 21 helped confirm the movement. After the observatory obtained further confirmatory photographs, news of the discovery was telegraphed to the Harvard College Observatory on March 13, 1930.
8,000 years before Western science somehow ancient Sumer knew not just all of the planets but their positions in the solar system and relative sizes.