According to the Hubble classification scheme, an Sa galaxy has
A) a large central bulge and tightly wound spiral arms.
B) an irregular shape with no obvious disk or spiral arms.
C) a round or spherical appearance with a smooth light distribution.
D) a small central bulge and loosely wound spiral arms.

Question

Quizplus · Accepted Answer

Sa galaxies, according to the Hubble classification scheme, are characterized by having a large central bulge and tightly wound spiral arms. This classification is part of the broader category of spiral galaxies, which are differentiated by the size of their central bulge and the tightness of their spiral arms, with Sa galaxies being on one end of the spectrum with larger bulges and tighter arms.

According to the Hubble Classification Scheme, an Sa Galaxy Has