All galaxies have a dense core of stars. Spiral galaxies, however, have arms that are often visible. There are two kinds of spiral galaxies: barred, where there appears to be a line running from arm to arm through the core, and <span>ordinary, where there is no bar. @Badbunnyhunny</span>
They are reactants because they are present before the reaction.
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The milky way is your answer
Answer:
The following characterized articles that are published in scientific journals are D, because they have to explain scientific and be written .
Explanation:
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