How can an observer definitively distinguish Jupiter from an airplane?
Answer
Observe the light for three minutes to see if its position shifts relative to stars.
A frequent point of confusion is differentiating between a bright planet and an aircraft. Because airplanes are moving vehicles, they will change position relative to the background stars over time. If you observe the light for roughly three minutes and it maintains the same position relative to the surrounding stars, it is Jupiter. If the light moves or shifts its position even slightly, it is undoubtedly an aircraft.
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How to Find Jupiter in the Night Sky - YouTube
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