The interstellar object 3I/ATLAS has drawn new scrutiny from astronomers after Harvard astrophysicist Avi Loeb suggested it could be composed of antimatter.
Loeb described antimatter as
"the most efficient fuel"in the universe, arguing that its interaction with solar particles could account for the object's unusual brightness and apparent acceleration.
According to Loeb,
"If 3I/ATLAS truly contained it, its passage through the solar wind might generate detectable gamma-ray or X-ray emissions-signals that NASA's Fermi Gamma-Ray Space Telescope could observe."
Author's summary: Avi Loeb suggests 3I/ATLAS may contain antimatter.