Astronomers Discover Exceptionally Symmetrical Supernova Remnant Teleios

Astronomers Discover ‘Teleios’: A Supernova Remnant with Astonishing Perfect Symmetry

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 part of the Evolutionary Map of th…

Astronomers Discover Exceptionally Symmetrical Supernova Remnant Teleios

A newly discovered supernova remnant named “Teleios,” meaning “perfect” in Greek, is astonishing scientists with its rare circular symmetry. Detected using data from ASKAP’s Evolutionary Map of the Universe, Teleios (G305.4–2.2) could be located 7,170 or 25,100 light years away. With a steep spectral index and low surface brightness, its origin is likely a Type Ia supernova. However, more high-resolution studies are needed to confirm this. Telei…