Final answer:
The central division of a star refers to the region at the center of a galaxy where stars, gas, and dust are concentrated. This region often contains a central bar and spiral arms.
Step-by-step explanation:
The central division of the star refers to the region at the center of a galaxy where stars, gas, and dust are concentrated. This central region often contains a central bar and spiral arms. For example, in our own Milky Way galaxy, the central bar is composed mostly of old yellow-red stars, while the spiral arms are highlighted by the blue light from young hot stars. Barred spirals galaxies, like our Milky Way, also have bar-shaped concentrations of stars in their central regions.