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Science Bowl Question

📅 NSB 2015🎓 HS🔄 Round 14#️⃣ Q13🌟 BONUS📝 Multiple Choice

Which of the following is true about spiral galaxies?

W) Their spiral arms are dark due to the presence of cool, red stars
X) They are the rarest type of galaxy in the observable universe
Y) They originate from supernova explosions
Z) Spiral galaxies with patchy arms are called flocculent spirals
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