“These nearby external galaxies offer an ideal laboratory since they are close enough to be resolved, yet located at relatively well-know distances.”
On top of the supernova remnant discovery, the astronomers found more than 20 planetary nebulas.
Planetary nebulas are bright clouds of stellar gas ejected by burnt-out red giant stars transitioning into their white dwarf stage.
The discoveries were part of the Evolutionary Map of the Universe (EMU) pilot survey project.
The intergalactic survey project was aided by the new Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope.