The simplest looking are the ellipticals [elliptical galaxy]. They have the shape of spheres or ellipsoids - flattened spheres. They are classified as E0 [E0 galaxy], E1, E2 [E2 galaxy], and so on up to E7 [E7 galaxy] on the basis of the amount of flattening. E0 [E0 galaxy] ellipticals are those that appear circular to us. The flattening is greater as the number gets greater.