In the Hubble classification scheme,the four main categories of galaxies include all of the following EXCEPT
A) normal spirals.
B) barred spirals.
C) starbursts.
D) ellipticals.

Question

Quizplus · Accepted Answer

The four main categories of galaxies in the Hubble classification scheme are normal spirals (S), barred spirals (SB), ellipticals (E), and irregulars (Ir). Starbursts are not a main category, but rather a type of galaxy that experiences a burst of star formation activity.

In the Hubble Classification Scheme,the Four Main Categories of Galaxies