Iapetus revolves counterclockwise, meaning that only one side of Iapetus gets hit with the particles coming off of Phoebe when they revolve past each other.

Source: https://mashable.com/article/sun-stars-space-facts

Players have the option to rotate the devices clockwise or counterclockwise and afterward press Launch from the starting device to try destroying all orbs.

Source: https://gamerant.com/honkai-star-rail-all-luminflux-pyxis-puzzle-solutions-day-1-2-3-location-artisanship-commission/

The spotters fly clockwise above other aircraft so they can more easily watch the water- or retardant-dropping aircraft that are flying counterclockwise.

Source: https://www.ocregister.com/2023/08/08/cal-fire-to-probe-tragic-missteps-in-aerial-firefighting-ballet/