What is planetary moons?

Planetary moons, or natural satellites, are celestial bodies that orbit planets, typically held in place by the planet's gravitational pull. They vary widely in size, composition, and number, with some planets having numerous moons while others have none. Notable examples include Earth's Moon, Jupiter's Ganymede (the largest moon in the solar system), and Saturn's Titan, which has a thick atmosphere. Moons can play significant roles in their planets' ecosystems and can influence tidal forces and geological activity.