Satellite black knight
Oil, Acrylic on Canvas, 2019
200 x 134 cm
The origin of the Black Knight legend is often "retrospectively dated" back to natural extraterrestrial repeating sources supposedly heard during the 1899 radio experiments of Nikola Tesla and long delayed echoes first heard by amateur radio operator Jørgen Hals in Oslo, Norway, in 1928.
Brian Dunning of the Skeptoid podcast attributes Tesla's 1899 radio signals to pulsars, which were not identified until 1968.