The Ring Nebula Has an “Iron Bar”
The Ring Nebula in Lyra, also known as Messier 57, is the most famous planetary nebula in the sky. It’s also one of the most imaged and studied objects of its class. But when Roger Wesson (Cardiff University, UK) and his colleagues analyzed a series of spectra taken between May and June 2023, they found something completely new: An oddly shaped “bar” of ionized iron gas that crosses the nebula roughly from west to east along the elliptical ring’s major axis.