Star-forming galaxies are galaxies that actively produce new stars. This process occurs in regions of dense gas and dust, where gravitational forces cause the material to collapse and ignite nuclear fusion. These galaxies are often identified by their bright, blue colors, which indicate the presence of young, hot stars. The rate of star formation can vary significantly among different galaxies. Some, like the Milky Way, form stars at a moderate pace, while others, known as starburst galaxies, create stars at an exceptionally high rate. Understanding star-forming galaxies helps astronomers learn about the evolution of the universe and the lifecycle of galaxies.