_:b670469567 . _:b670469567 . _:b670469567 . _:b670469567 "https://en.wikipedia.org/wiki/Halo_(optical_phenomenon)" . _:b670469567 . _:b670469567 "A photometeor which is produced by light that is reflected, refracted, and dispersed by ice crystals, capable of acting as prisms and mirrors, suspended in an astronomical body's atmosphere." .