==Clasification==
Elliptical galaxies lie on the "handle" side of the [[Hubble tuning fork diagram]]. Different ellipticals are classified by their [[ellipse|eccentricity]], or how "elliptical" they are, with a larger number meaning they are more "elliptical". This is calculated using the formula:<ref name=britannica/>
:<math>
</math>
Where a and b are the semi major and semi minor axes of the galaxy as seen from [[Earth]]. n is rounded to the nearest [[integer]] and the galaxy labelled "En". For example, an E0 galaxy is perfectly spherical, while an E7 has a very high eccentricity. No elliptical galaxies have n greater than 7.<ref name=britannica/>
==References==