How does the appearance of spiral galaxies vary? Select the two correct answers.(1 point)
Responses
Some have a band of stars and materials through their middle, but others do not.
Some have a band of stars and materials through their middle, but others do not.
Some are more elongated in shape than others.
Some are more elongated in shape than others.
They vary in how tightly their arms are wound.
They vary in how tightly their arms are wound.
They vary in the brightness of stars located on their arms.
They vary in how tightly their arms are wound.
They vary in the brightness of stars located on their arms.
The correct answers are:
1. Some have a band of stars and materials through their middle, but others do not.
2. They vary in how tightly their arms are wound.
The correct answers are:
1. Some have a band of stars and materials through their middle, but others do not.
2. They vary in how tightly their arms are wound.
To determine the correct answers, we can refer to the characteristics of spiral galaxies. One notable feature of spiral galaxies is the presence of a band of stars and materials called the galactic bulge that runs through their middle. However, not all spiral galaxies have this feature, so some have a band of stars and materials through their middle, while others do not.
Another characteristic of spiral galaxies is the way their spiral arms are wound. Some spiral galaxies have tightly wound arms, while others have more loosely wound arms. This variation in the tightness of the spiral arms adds to the diversity of appearance among spiral galaxies.
Based on this information, the correct answers are:
1. Some have a band of stars and materials through their middle, but others do not.
2. They vary in how tightly their arms are wound.