How does the appearance of spiral galaxies vary? Select the two correct answers.(1 point)
Responses
They vary in the brightness of stars located on their arms.
They vary in the brightness of stars located on their arms.
Some are more elongated in shape than others.
Some are more elongated in shape than others.
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.
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.
Some are more elongated in shape than others.
Some have a band of stars and materials through their middle, but others do not.
They vary in how tightly their arms are wound.
all i need is 2
They vary in the brightness of stars located on their arms.
Some are more elongated in shape than others.
The correct answers are:
1. They vary in the brightness of stars located on their arms.
2. Some are more elongated in shape than others.
3. Some have a band of stars and materials through their middle, but others do not.
4. They vary in how tightly their arms are wound.
The correct answers are:
1. They vary in the brightness of stars located on their arms.
2. Some are more elongated in shape than others.
To determine these answers, you can study images and observations of spiral galaxies. Astronomers use telescopes to capture images of galaxies, and they analyze the data to identify different characteristics. By examining the brightness of stars located on the arms of spiral galaxies, astronomers can observe variations in their brightness.
Additionally, the shape of spiral galaxies can vary. Some galaxies may have a more elongated shape, appearing stretched out, while others may have a rounder or more compact shape. This can be determined by measuring the length and width of the galaxy's structure.
It is also worth noting that spiral galaxies can have a band of stars and materials running through their middle, known as a "bar," but not all spiral galaxies exhibit this feature. The presence or absence of a bar is another characteristic that can vary among spiral galaxies.
Lastly, spiral galaxies can vary in how tightly their arms are wound. Some galaxies have tightly wound arms, while others have looser or more open arms. This can be observed by analyzing the structure and arrangement of the spiral arms in the galaxy's image.
Overall, studying images, observations, and data of spiral galaxies allows astronomers to identify and describe the varying appearances of these celestial objects.