No, an EO galaxy is not a type of elliptical galaxy. They are a lenticular galaxy.
Yes, the E7 is a type of elliptical galaxy. These have a specific elliptical shape.
An elliptical galaxy, seen "face-on". (E7 would be "edge-on".)
An elliptical galaxy, seen "face-on". (E7 would be "edge-on".)
An elliptical galaxy is a type of galaxy not a particular one.
According to the Hubble classification system, an E0 galaxy should appear almost perfectly circular in shape, with an E7 appearing highly elliptical. In effect, as the number gets larger the eccentricity of the ellipse increases, so an E0 has no eccentricity!
An elliptical galaxy.
Generally, an Elliptical galaxy is the oldest type of galaxy.
Messier 87 is an elliptical galaxy.
We live in a spiral galaxy, not in an elliptical galaxy.
The most common type of galaxy is a dwarf elliptical galaxy.If you classify a dwarf galaxy as a galaxy, then that is your answer, however, if you don't, then a spiral galaxy will be the answer.See the related question for more details.
Elliptical
The Hubble morphological classificationof galaxies has four different types of elliptical galaxiesThey range from E0 (Circular or soccer ball) to E7 (American football or rugby ball)See related link for a pictorial
An elliptical galaxy