Elliptical galaxies constitute approximately 25% of total number of galaxies with high luminosity. Traditionally, capital letter E identifies such galaxies. A typical E-galaxy looks like a sphere or an ellipsoid. It has virtually no disk. Elliptical galaxies, like the spherical components of other types of galaxies, are virtually stripped of cosmic gas (except for the rarefied and hot gas that that is present throughout the entire galaxy), and, consequently, no young stars are found in elliptical galaxies. Edwin Hubble broke down elliptical galaxies into 8 subtypes from E0 to E7, classifying them according to different degrees of oblongness (E0 are the ball-shaped galaxies, E7 are the flat ones). The intermediate-type galaxies are known as S0.
Stars in elliptical galaxies rotate very slowly (rotation speed normally does not exceed several dozens km/s). Thus, elliptical galaxies are systems with low specific moment of pulse.
This 3D dynamic model represents one of the most prominent theories regarding the evolution of elliptical galaxies. According to this theory, elliptical galaxies form as a result of slowly rotating clouds. Press "Run" button to observe how stars gradually come into being from certain parts of the cloud. Formation of stars takes several billions of years. This model stops after four billions of virtual years.
A special input window allows you to observe the galactic rotation from different angles of perspective. "Stop" and "Reset" buttons bring the model to a halt and return it to its initial state, respectively.