They’re in orbits at different distances from the sun and so take different times to complete an orbit. Also we’re closer to the sun than most, so circling faster, and further than Venus and Mercury so circling slower, so sometimes some planets appear to be going the wrong way along the ecliptic
Some planets are in resonance with others (for example orbiting 3 times for the other’s 4)
So sometimes other planets are on the other side of the sun, sometimes they’re on this side of the sun but the opposite side of the sky
They’re in orbits at different distances from the sun and so take different times to complete an orbit. Also we’re closer to the sun than most, so circling faster, and further than Venus and Mercury so circling slower, so sometimes some planets appear to be going the wrong way along the ecliptic
Some planets are in resonance with others (for example orbiting 3 times for the other’s 4)
So sometimes other planets are on the other side of the sun, sometimes they’re on this side of the sun but the opposite side of the sky