During a transit, a rapidly rotating star being observed appears to be slightly redshifted then blueshifted. Which of the following statements best explains this observation?
W) The star has an exoplanet with a retrograde orbit
X) The star has an exoplanet with a prograde orbit
Y) The star is actually a binary system
Z) The star's axis of rotation is wobbling rapidly
✔️Answer:W) The star has an exoplanet with a retrograde orbit
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