rare perfect circular supernova remnant

May 18, 2025 — In a remarkable astronomical breakthrough, scientists have identified a new supernova remnant (SNR) exhibiting nearly perfect circular symmetry, an extremely rare phenomenon in cosmic structures. Named “Teleios”—from the Greek word meaning perfect—this celestial formation is officially designated as G305.4–2.2, and was discovered through the Australian Square Kilometre Array Pathfinder (ASKAP) as … Read more