Within globular clusters, the brightest bodies are giant stars which eject material from their outer atmospheres as they die. (newscientist.com)
When the supernova remnant RCW 103 was first observed 25 years ago, it seemed to be a textbook example of a massive star's death: a gaseous cloud of ejected material surrounding a neutron star only about 12 miles across. (scientificamerican.com)
Canup's computer models show that to produce a single moon - size satellite, an impact would have to eject material with at least twice the mass of the moon. (discovermagazine.com)