While Amaterasu is not a real solar probe, the Japanese sun deity’s name was used for an ultra-high-energy cosmic ray.

The detection of the Amaterasu particle, a cosmic ray packing over 240 exa-electronvolts (EeV) of energy, was so surprising that Toshihiro Fujii of Osaka Metropolitan University initially assumed there was a mistake in the data. Fujii later commented, “No promising astronomical object matching the direction from which the cosmic ray arrived has been identified, suggesting possibilities of unknown astronomical phenomena and novel physical origins beyond the Standard Model”.