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How does the appearance of spiral galaxies vary? Select the two correct answers.(1 point)

Responses

Some are more elongated in shape than others.
Some are more elongated in shape than others.

They vary in the brightness of stars located on their arms.
They vary in the brightness of stars located on their arms.

They vary in how tightly their arms are wound.
They vary in how tightly their arms are wound.

Some have a band of stars and materials through their middle, but others do not.

1 answer

The two correct answers regarding the variation in the appearance of spiral galaxies are:

  1. They vary in how tightly their arms are wound.
  2. Some have a band of stars and materials through their middle, but others do not.

These variations are part of what distinguishes different types of spiral galaxies.