for now Earth is content with its one and only Moon
Earth could theoretically handle multiple moons, but the main factor is space. Any moon needs a clean orbit, and two things need to be taken into account: it can’t be too far away, otherwise it won’t follow a stable orbit around us, and it can’t be too close either, or the gravitational pull of Earth will grind it into crumbs. These outer and inner limits define our moon zone, a donut-shaped area where any additional moon will have to live. Each moon around Earth requires its own personal submoon zone, and these zones shouldn’t interact with each other, like runners on an Olympic racetrack; they need to be spaced out so that their mutual influence is kept to a minimum. The bigger the mass of a moon, the larger the personal space required. All in all, simulations have shown that only a few constellations would be stable. Earth could either host up to seven moons as big as dwarf planet Ceres, four Pluto-sized moons, or three moon-sized moons. Tides might be more violent, there could be different climate systems, and most notably, on some nights our sky would be adorned with three bright marbles frequently casting beautiful shadows on each other. Wow, what a view! But for now, Earth is content with its one and only moon.