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Read the article to learn more about spiral galaxies. Spiral Galaxy Why are spiral galaxies so bright?

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Answer:

Spiral galaxies are bright because they contain huge numbers of stars

Step-by-step explanation:

User Zero Live
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Answer:

Spiral Galaxys are bright because they're full of gas and dust which are the ingredients to make new stars. When these new stars form they are very bright.

Step-by-step explanation:

User Yuval Adam
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