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 are more elongated in shape than others.
They vary in the brightness of stars located on their arms.
They vary in how tightly their arms are wound.
Both of these answers are correct:
- Some have a band of stars and materials through their middle, but others do not.
- 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 how the appearance of spiral galaxies varies, we can compare different characteristics of these galaxies. Here are the two correct answers:
1. Some have a band of stars and materials through their middle, but others do not: This refers to the presence or absence of a central bar in the spiral galaxy. Some spiral galaxies have a distinct band of stars and materials crossing through their central region, while others do not have this feature.
2. They vary in how tightly their arms are wound: The spiral arms of galaxies can be loosely or tightly wound, creating different appearances. Some spiral galaxies have more tightly wound arms, while others have looser or more open arms.
These two factors contribute to the variation in the appearance of spiral galaxies.