🤯 Did You Know? The Ring Nebula Is Hiding a Planet-Killing Iron Giant. Astronomers have detected a colossal bar-shaped structure composed mostly of iron atoms deep inside the iconic Ring Nebula (Messier 57 / NGC 6720) — one of the best-known planetary nebulae in the night sky. The feature was identified using a new instrument that maps elemental emission across an entire nebula with unprecedented detail. #DidYouKnow,#SpaceMystery,#RingNebula,#CosmicSecrets,#Astronomy,#DeepSpace,#SpaceDiscovery,