Jupiter Retrograde 2025 Jupiter, the largest planet in our solar system, undergoes an apparent retrograde motion as seen from Earth. But what does that mean? Retrograde motion is an optical illusion that occurs when a planet appears to move backward in the sky due to differences in orbital speeds. As Earth, moving faster in its inner orbit, overtakes Jupiter, the gas giant seems to temporarily reverse direction before continuing its normal prograde motion. Jupiter’s next retrograde motion will t