1. I. JupiterOuter Planets A. Size:______ the mass of all other planets combined ______ the mass of Earth B. Distance from Sun:_______ (______ the sunlight as Earth) C. Composition:Mostly ________________________, rocky core D. Features: _________________, ______________, _____ _______________________, _______________ E. Moons:____ named satellites. Most (47) are less than 10 km in diameter. F. Galilean moons: _Io_ _______________ active body in solar system _Europa_ ____________ under its ice surface _Ganymede_____________ in solar system _Callisto_ __________ as Mercury Orbital Resonance IoEuropaGanymede Orbits

2. II. Saturn A. Size:_______________ B. Distance from Sun: ________ (almost______ the sunlight as Earth) C. Composition:Similar to _______, _____________________ D. Features: _________________, density less than ______ ___________, __________________ (slightly weaker than Earth’s) E. Rings: ________ ring system in the solar system. Mostly ______________, plus dust and debris. Particle sizes range from _____________________. Only ______ thick!! Gaps caused by the tugging of _______ outside the rings. F. Moons:____ named and unnamed satellites. Titan: __________ moon in solar system. Only moon with an ______________. Lakes of _____________.

3. III. Uranus A. Size:_______ mass of Earth B. Distance from Sun: ________ (almost_______ the sunlight as Earth) C. Composition:Similar to ________, ____________________ D. Features: ________________, _______________, ________ _____ E. Moons:____ F. Discovery:______. First planet discovered since antiquity. Identified multiple times initially as a ______ and then also as a ______. Discoverer Sir William Herschel first called the planet _____________ after King George III. As you might imagine, this choice was not very popular outside of Britain.

4. IV. Neptune A. Size:_______ mass of Earth B. Distance from Sun: ________ (about_______ the sunlight as Earth) C. Composition:Similar to ________, _____________________ D. Features: ______________, _______________, ________ _____ E. Moons:____ F. Discovery:______. First planet discovered by __________ from unexplained changes in the orbit of Uranus. Also identified multiple times initially as a _____. _______ first noted it in 1612.