Presentation on theme: "Gas Giants Jupiter, Saturn, Uranus, & Neptune Large, gaseous planets with small solid cores of metal & rock. Made mostly of Hydrogen & Helium – under great."— Presentation transcript:
Gas Giants Jupiter, Saturn, Uranus, & Neptune Large, gaseous planets with small solid cores of metal & rock. Made mostly of Hydrogen & Helium – under great pressures H & He existing as liquids w/in planet CH 25.4 Outer Planets
5.2 AUs from sun Orbit time (Rev.) = 12 yrs Rotation = 9.8 hours GASEOUS, LARGEST & MOST MASSIVE PLANET (mass = 318 x Earth) Atmosphere = Hydrogen, Helium Temps = -144C (but hot core) Lg. Magnetosphere – currents of metallic liquid Hydrogen Features: Cloud Bands, Giant Red Spot storm system, single faint ring moons: 50+ Exploration: Voyager & Galileo Spacecraft Flybys Y&feature=relmfu
Io - volcanic Ganymede – icy (Large) Callisto - icy Europa – icy (salt water ocean underneath) The History Channels The Universe – Jupiter
Most volcanically active location in the solar system.
Europa may have life under its salt water ocean under its frozen surface.
9.5 AUs from sun Orbit time (Rev) = 29.5 yrs Rotation = hrs GASEOUS- 2 nd Largest, Least dense (could float) Atmosphere: Hydrogen, Helium, + (Rains helium) Temps: -176C (hot core) Features: Large ring system (icy rock/dust) Cloud bands Moons: 30+
Titan: Saturns Moon Cassini-Huygens Mission recently explored Titan with a probe Cassini continues to explore Saturn Has an THICK ATMOSPHERE Nitrogen & Methane Liquid lakes of ethane & methane. The Universe: Saturn 1/3
19.2 AUs Orbit Time (Rev): 84 years Rotation: hrs. GASEOUS & RINGS Atmosphere: Hydrogen, Helium Methane, Ammonia Tilted on side 90 degrees and rotates backwards (retrograde) Temps: C (hot core) moon: 20+ The History Chanels Outer Planets:
30 AUs Orbit time (Rev) = 165 yrs. Rotation = hrs. GASEOUS & RINGS Atmosphere: Methane, Hydrogen, Ammonia Temps: -355 F Features Dark Spot storm system (vanished 1994) Clouds of Methane Ice Crystals Moons: 8+ (Triton is largest) Windiest Planet (1200 mph winds) D92C27&playnext=1&playnext_from=PL&index=13
Common Features of Outer Planets Large in size Gaseous surfaces of H & He Many Moons Rings Cold temperatures Long revolutions
40 AUs Trace Atmosphere (methane) Temps C/ -400F SOLID – icy rock w/ frozen methane Dense Moon: Charon (almost same size; they chase each other Eccentric &Tilted Orbit (17 degrees) Dwarf Planet Probably a Kuiper Belt Object New Horizons Spacecraft – left in 2006; will arrive in Discovery:
Reasons Pluto was Reclassified 1. Too small & solid(Outer planets are large & gaseous) 2. No rings 3. Only 1 moon (and it chases it). 4. Orbit is very elliptical & tilted 5. More in common with K.B.O.s
Kuiper Belt Short term comets are also in K. Belt (~ 200 yr.orbits) K.B.O.s Round icy rock bodies like Pluto continue to be found & classified. Starts at Neptunes orbit and extends for 30 – 50 AU out. In the ecliptic plane w. planets Sedna
library.thinkquest.org The Universe: The Outer Planets (& Pluto & KBO)
Dirty Snowballs with a rocky core Vapor tail forms as it approaches sun (Solar wind evaporates frozen gases) Tail faces away from sun Short Range – 200 yrs (K.Belt) Long Range – millions or years (Oort Cloud) Found in Kuiper Belt (region that Neptunes orbit and extends past Pluto & is in the ECLIPITC PLANE) & Oort Cloud (SPHERE OF Comets surrounding S. system as a shell)
Check Up 1.List 3 reasons why Pluto is an odd-ball 2.What is Pluto now considered? 3.What 2 places can you find comets? 4.Describe a KBO – where do you find them?
Birth of the Solar System (National Geographic) Planets form (Condensation Temps): Massive Solar Storms (National Geographic) Massive Solar Storms