[littl3chocobo]

if it follows a 24 hour rotation like earth it would in a 24 hour period cross over the others, they all move together i assume in a way that would allow this moon to have phases so like the moon which would cross over the planets would too only they are much /much/ larger than a moon so they would be visible each time they crossed

https://www.youtube.com/watch?v=L8wgJK9S45I start at 45 seconds and assume the small sun is the moon surounding the three planets, now bretend the small sun is the three planets orbiting the sun, if they all rotate then they should have periods where they have lunar phases, because of the nature of gravity the moon, even if magically powered, should move in the same general way as the other planets. this means the moon would have to go closer and farther to the sun giving it phases, the planets following the same general angle would also move around meaning that they would have to each wax and wane in their daily orbit


short of it the planets would have to circle each other while circling the sun for a moon to be able to orbit all three of them, physics demands it. giving them roughly equal parts of the moon of course means they must be fairly level with each other which would mean they'd have to cross each other to rotate