galactic cluster, new discoveries, planetary nebula

Oldest Visible Planetary Nebula Hosted by a 500 Million-Year-Old Galactic Cluster

An international team of astronomers led by members of the Laboratory for Space Research (LSR) and Department of Physics at The University of Hong Kong (HKU) has discovered a rare celestial jewel — a so-called planetary nebula (PN) inside a 500 million-year-old galactic open cluster (OC) called M37 (also known as NGC2099). This is a very ...

Troy Oakes

A planetary nebula.