An elliptical galaxy is a type of galaxy characterized by its smooth, featureless light profile and an ellipsoidal shape. These galaxies contain older stars and very little interstellar gas and dust, which means they have a lower rate of star formation compared to other galaxy types like spiral galaxies. Elliptical galaxies can vary in size, from small dwarf galaxies to massive giants. They are often found in galaxy clusters and can be the result of the merging of smaller galaxies. Their structure and composition make them an important area of study in understanding the evolution of the universe.