Question

Which group of features best describes an irregular galaxy?

a) Spiral arms and central bulge
b) Distinct, symmetrical structure
c) No specific shape or structure
d) Elliptical shape with no spiral arms

Answer 1

Irregular galaxies do not have a specific shape or structure. They often appear disorganized and have lower masses and luminosities compared to spiral galaxies. Irregular galaxies frequently undergo intense star formation activity.

Step-by-step explanation:

Irregular galaxies are a group of galaxies that do not have a specific shape or structure. They often appear disorganized and can vary in size, mass, and luminosity. Irregular galaxies are characterized by their lower masses and luminosities compared to spiral galaxies, and they frequently undergo intense star formation activity, containing both young population I stars and old population II stars.