Astronomers have discovered the eerie remains of a supernova with an almost perfect spherical shape glowing faintly on the outskirts of the Milky Way. However, they are unsure exactly how large and how far away the ghostly orb is — or how it got its unusually symmetrical shape.
The scientists named the object G305.4–2.2, or Telios — Greek for "perfect." Telios was spotted in radio images captured by the Australian Square Kilometre Array Pathfinder (ASKAP) telescope in Western Australia for the Evolutionary Map of the Universe project. It is a supernova remnant (SNR) — an expanding cloud of gas and radiation left over from an exploded star.
