Question

which type of galaxy has arms that contain sites of active star formation and start close to a bulge in the center?
elliptical
irregular
barred spiral
normal spiral

Explanation:

• Elliptical galaxies: Have smooth, feature - less light distributions. They lack significant star - forming regions as they are mostly composed of old stars.
• Irregular galaxies: Do have active star formation, but they do not have a well - defined bulge and spiral arm structure starting close to a bulge.
• Barred spiral galaxies: Have a central bar - shaped structure. The arms start close to the bulge (or the ends of the bar which is near the bulge - like region). And the arms are sites of active star formation due to the presence of gas and dust that can collapse to form stars.
• Normal spiral galaxies: Have arms that start from the bulge, but the key difference in the context of this question is that barred spiral galaxies are more specifically known for the arm - bulge connection and active star formation in arms in a way that is distinct from normal spirals (normal spirals may have more variation in arm - bulge relationships and barred spirals have a more prominent bar - related structure that affects star formation in arms).

Answer:

C. barred spiral