Scientists are investigating the origin of one of the most energetic particles ever seen hitting Earth from space. The Amaterasu particle, named for the Japanese sun goddess, was first detected in 2021, carrying 40 million times more energy than particles accelerated by the world's largest and most powerful particle accelerator, the Large Hadron Collider (LHC).
Amaterasu is an example of a cosmic ray, energetic charged particles that race through space at nearly the speed of light. It is the second most energetic cosmic ray ever detected after the "Oh-My-God" particle, detected in 1991. Such high-energy particles are extremely rare, which means scientists would very much like to understand their origins — currently thought to involve the wreckage of supernova explosions and central regions of galaxies dominated by feeding supermassive black holes.
