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Science Bowl Question

📅 NSB 2019🎓 HS🔄 Round 15#️⃣ Q3🌟 BONUS📝 Multiple Choice

A star is consistently observed to have a 1% dip in brightness lasting for 3 hours every 3 days. Which of the following is the best explanation of this phenomenon?

W) The star is an intrinsic variable
X) The star is rotating
Y) The star has an exoplanet
Z) The observation is distorted by parallax
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