The orbits of the planets don’t behave “regularly” when observed from the Earth, exactly because they orbit the Sun and not the Earth. https://en.m.wikipedia.o

The orbits of the planets don’t behave “regularly” when observed from the Earth, exactly because they orbit the Sun and not the Earth. https://en.m.wikipedia.org/wiki/Apparent_retrograde_motion https://en.m.wikipedia.org/wiki/Apparent_retrograde_motion