Retrograde motion is an optical illusion where outer planets like Saturn and Neptune appear to move backward across the sky, caused by Earth's faster orbital speed 'lapping' them like a faster runner on an inside track, making the outer planets seem to drift, pause, and reverse their apparent motion.
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The Retrograde Dance of Saturn and Neptune 🌌 #Shorts追加:
Two worlds have been dancing across the sky for months and almost nobody noticed. Saturn and Neptune aren't actually moving backward. That's just Earth lapping them like a faster runner on an inside [music] track making the outer planets appear to drift, pause, and reverse.
Over 34 nights, astronomers captured this cosmic choreography. Two giants swaying closer than they've been since 1989.
The universe has been putting on a show and the night sky [music] was always the stage.
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