Moons are celestial bodies that orbit planets and other astronomical objects. In astronomy, there are several different types of moons that can be found in our solar system and beyond. The most common type of moon is a natural satellite, which is a celestial body that orbits a planet or other astronomical object. Natural satellites can range in size from small asteroids to large planets.
Some of the most well-known natural satellites in our solar system include Earth's Moon, Jupiter's four Galilean moons, Saturn's moons Titan and Enceladus, and Neptune's moon Triton. Another type of moon is an artificial satellite, which is a man-made object that orbits a planet or other astronomical object. Artificial satellites are typically used for communication, navigation, and observation purposes. Examples of artificial satellites include the International Space Station, the Hubble Space Telescope, and various communication satellites.
A third type of moon is a dwarf planet moon, which is a natural satellite that orbits a dwarf planet. Dwarf planets are celestial bodies that are too small to be considered full-fledged planets but are larger than asteroids or comets. Examples of dwarf planet moons include Pluto's moons Charon and Styx, Haumea's moons Hi'iaka and Namaka, and Makemake's moon MK2.A fourth type of moon is a Trojan moon, which is a natural satellite that orbits a planet or other astronomical object at the same distance as another celestial body. Trojan moons are typically found in the Lagrangian points of the two bodies' orbits.
Examples of Trojan moons include Jupiter's Trojan moons Elara and Himalia, Saturn's Trojan moons Telesto and Calypso, and Neptune's Trojan moon Neso. Finally, there are exomoons, which are natural satellites that orbit exoplanets (planets outside our solar system). Exomoons are much harder to detect than other types of moons due to their distance from Earth. However, several exomoons have been discovered in recent years, including Kepler-1625b I and Kepler-1625b II, which orbit the exoplanet Kepler-1625b.