ASTR 1345 1st Edition Lecture 22 Outline of Last Lecture I. Mars’ Moons II. Voyager MissionsIII. Galileo MissionIV. Cassini MissionV. JupiterA. Jupiter’s InteriorB. Jupiter’s AtmosphereC. Jupiter’s AuroraOutline of Current Lecture I. Jupiter’s MoonsA. IoB. EuropaII. SaturnA. Saturn’s RingsB. TitanIII. UranusIV. NeptuneCurrent Lecturel.Jupiter has many moons but the 4 main ones are Io, Europa, Ganymede, and Calisto. Ganymede and Calisto are as large as Mercury.A. Io is filled with craters and volcanoes. It lost its water through tidal heating caused byinternal stresses produced as its distance from Jupiter changes during its orbit. This isthe most volcanically active moon in the solar system and it produces a lot of mountains and geysers. Like our own Moon, Io always shows the same face to Jupiter because it has the same rotation as Jupiter.B. 25% of Europa’s mass could be water. This evidence comes from the surface ice flowsand the moon’s reddish color due to salt deposits. It also has numerous surface cracks due to tidal flexing.These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.ll.Scientists believe there’s a hurricane on Saturn’s north pole that’s hexagon shaped and been there for many years. Saturn has visible rings, 60 moons, and a very low temp. It’s about 10AU and the mass is 100 times the mass of Earth. It has a low density, a 10hr day, and the tilt of its axis is about 27 degrees. It has a rocky core like all other gas giants and at its south pole a stormA. Saturn’s rings are less than 100m thick, but stretch over a hundred thousand km. Therings extend to the Roche limit, which is when Saturn’s tidal forces overwhelm the tendency for particles to conglomerate. The F ring is the outermost ring, then A ring, B ring and C ring is closest to the planet.B. Titan is Saturn’s largest moon and has a substantial atmosphere with 90% nitrogen, 10% argon, and the rest methane. The atmosphere could produce early primitive life forms. It’s very cold and the methane prevents the atmosphere from freezing.lll.Uranus is 14.5 times the mass of the Earth, 20AU, and rotates at about 84 Earth years. The outerlayers are hydrogen, helium, and methane which absorbs red light and forms higher clouds giving the planet its blue colors. It has about 98 degree tilt and extreme seasons. Uranus has 5 moons, Miranda is one of them.lV.Neptune has extreme high speed winds as fast as 2000km/h. It’s 30AU, 19hrs per day and extremely cold. It also appears blue because of methane in its atmosphere. Neptune has a total of 6 moons and Triton is Neptune’s largest
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