Jovian Planets and Related Bodies Summary

Jovian planets, or gas giants, include Jupiter, Saturn, Uranus, and Neptune. They are predominantly composed of gas and ice, have thick atmospheres, and exhibit rapid rotation.

Characteristics: All possess ring systems and multiple moons.
Jupiter: Largest planet, mainly hydrogen and helium, featuring a rocky core, thick colorful clouds, and the Great Red Spot, a storm lasting over 300 years.
Saturn: Second largest, with low density allowing it to float on water, and a pale yellow appearance due to ammonia. Known for large storms, especially a hexagonal one at its north pole.
Uranus: An ice giant, pale blue-green from methane, hosting 27 small moons.
Neptune: Farthest from the Sun, another ice giant with the strongest winds (up to 1,200 MPH) and a deep blue color. Features the Great Dark Spot and has 13 moons.
Jovian Moons: Over 150 moons, significant ones include Io (most volcanically active), Europa (ice-covered, potential for life), Ganymede (largest moon), and Callisto (cratered).
Dwarf Planets and Minor Planets: Dwarf planets (e.g., Pluto) have not cleared their orbits, while minor planets include asteroids and meteoroids that burn up in the atmosphere as meteors.
Comets: Composed of ice and develop tails near the Sun.
Key Vocabulary: Liquid metallic hydrogen, Kuiper belt, meteor, meteorite, chondrule.