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Science Bowl Question

📅 NSB Round Robin 2009🎓 HS🔄 Round 14#️⃣ Question 7❓ TOSS-UP📝 Multiple Choice

Which of the following is TRUE of red supergiants:

W) some form Cepheid variables
X) most end as nova stars
Y) most have luminosities about 10 to 100 times that of our Sun
Z) most have surface temperatures at least 2-times that of our Sun
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