From SPTelescope https://twitter.com/SPTelescope on Twitter: Another SPT sundog pic from a couple days ago by Amy Bender! The shape of the ice-crystal refraction pattern has been a topic of debate amongst the physicists at the South Pole! @AstroKatie #sundog #southpole #Antarctica #Science https://twitter.com/SPTelescope/status/1072743371318460417/photo/1 https://chirp.cooleysekula.net/attachment/53098