Galaxy Types Quick Check

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Question
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 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.
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