Two types of spiral galaxies exist. a normal spiral galaxy is one kind. which phrase best describes the second type of spieal galaxy? a. is football shaped b. is irregular shaped c. has arms that start close to the center d. has a bar through the middle from which arms extend

The correct answer is D. It is called barred spiral galaxy, the spiral arms arise from the end of the bar and it is thought that the bar acts as a mechanism that channels the interstellar gas from the arms towards the center through orbital resonance.

Answer

Correct Answer is D(D. has a bar through the middle from which arms extend)

Explanation:

there are two types of spiral galaxy

Normal spiral galaxy

The normal spirals galaxy is a galaxy which does not have bar at the center and it have arms which start close to the center.

Barred Spiral galaxy:

It is a spiral galaxy  which has a bar through the middle from which arms extend. Bar is composed of stars. One third of spiral galaxy has bar in the middle.

Hope this answer will help you

1 the 4 is sig