 Izuki-18 is classified as a dwarf irregular galaxy and is much smaller than our Milky Way. The concentrated bluish white knots embedded in the heart of the galaxy are two major starburst regions where stars are forming at a significant rate. The wispy blue filaments surrounding the central starburst regions are bubbles of gas that have been blown away by stellar winds and supernova explosions from a previous generation of stars. This gas is now heated by intense ultraviolet radiation from hot young stars. Besides the bluish white young stars, white reddish stars also are visible. These stars are thought to be around 10 billion years old.