The elliptical galaxy is an older galaxy. It tends to be filled with older red stars. This galaxy often has a reddish color. The elliptical galaxy has much less dust and gas than a spiral galaxy. As a result, there is little material available to make new stars.
Photo: Elliptical galaxy (Creative Commons: Caltech).
An elliptical galaxy is less bright than the younger spiral galaxy. It also lacks the long spiral arms where stars are being formed. This type of galaxy is older with little dust and gas available for the creation of new stars.
Shape and Color
Elliptical galaxies have an ellipsoid shape. They range in shape from a round sphere to a flattened one. These galaxies are filled with older red stars. As a result, they usually have a reddish color.
It is thought that elliptical galaxies are created when two galaxies collide and combine with each other. A super large black hole is thought to exist at the center of an elliptical galaxy. This black hole limits the formation of new stars.
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