Dr. Morales1Astronomy M01Introductory AstronomyBy Dr. Morales0•Exploring the Outer Planets•The Giant Planets•Atmospheres of the Giant PlanetsCh. 11: The Giant PlanetsDr. Morales11
Dr. Morales2Jupiter♃D = 5.2 AUM = 318 M⊕r= 1.33 g/cm3Uranus♅D = 19.2 AUM = 14 M⊕r= 1.24 g/cm3Saturn♄D = 9.5 AUM = 95 M⊕r= 0.71 g/cm3Neptune♆D = 30.1 AUM = 17 M⊕r= 1.67 g/cm3The Jovian PlanetsDr. Morales22The Outer Planets•The next 4 planets out from theare Jupiter, Saturn, Uranus, & Neptune—theJovian (Jupiter-like) planets•Significantly different from the terrestrial planets:•farther from the& much larger•more gaseous,îr, &∀have some sort of rings•Large sizesà ìgravityàcan hold onto lighter elementDr. Morales33
Dr. Morales3Internal StructuresSimplified hypothetical internal structuresH and He = the primary constituents of Jupiterand Saturn(like), while compounds of C, N andO comprise a large part of Uranus and Neptune(Radii are labeled in 1000-km units)Dr. Morales44Dr. Morales5Jupiter♃5
Dr. Morales4AboutJupiter•Jupiter = the largest planet in the solar system, 1stvisitedby Voyager S/C, orbited manyyrsby the Galileo S/C, andcurrently by Juno S/C•It's Diameter ~ 11× D⊕(> ~1,000⊕s inside!)•It’s a giant ball of gas w/ no solid surface•Temperature: -234°F (-148°C) average•Viewed through a telescope, Jupiter is•Stunningly colorful—w/bands of blue, brown, pink, red, orange, yellow•Most distinguishing feature:the Great Red Spot—an intense, giantwindstorm (larger in size than⊕), continued for centuries,counterclockwise, period ~6 days•Atmosphere is composed of whirling clouds of coloreddust, hydrogen, helium, methane, water, & ammonia.