A total solar eclipse occurred on August 18, 1868, also known as "The King of Siam's eclipse". A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. Read more
August 18, 1868 In his book Les Eclipses de Soleil, M.G. Bigourdan published a sketch of an eclipse of , made by Bullock in Manila and on which a comet like object, starting from the edge of the sun and moon. This sketch is also published in the book of Angelo Secchi (1818-1878), but no other numerous eclipse observer noticed the comet