An astronomer studying a distant cluster of galaxies finds that several of the galaxies are spiral-shaped, with a small nuclear region and loosely wound arms. How should the astronomer classify these galaxies?
A) Sa
B) SBb
C) Sc
D) Sb

Question

Quizplus · Accepted Answer

Galaxies described as having a small nuclear region and loosely wound arms are classified as Sc type in the Hubble sequence. This classification indicates spiral galaxies with less tightly bound arms than those in the Sa or Sb categories.

An Astronomer Studying a Distant Cluster of Galaxies Finds That