An Sc spiral galaxy is a type of spiral galaxy characterized by its loosely wound arms and a relatively small central bulge. These galaxies typically have a high concentration of gas and dust, which allows for active star formation. The arms of an Sc spiral galaxy are often bright and contain many young, blue stars. Sc spiral galaxies are part of the Hubble classification system, which categorizes galaxies based on their appearance. They are less tightly wound than Sa or Sb spiral galaxies, making them appear more open. Examples of Sc spiral galaxies include the Messier 33 and NGC 300.