ASTR 151 1st Edition Lecture 28 Outline of Last LectureI. Chapter 12 ReviewII. Chapter 12. 5III. Chapter 12 SummaryOutline of Current LectureIV. Planet Neptune UranusV. Chapter 13 Section 1VI. Chapter 13 Section 2Current LectureI. Planet Neptune Uranus biographya. Uranusi. Discovered by W. Herschel 1781ii. Rotates in it`s sideiii. Only Greek named planet in solar systemiv. Means “sky” or “heaven”v. 1 of 6 children of the titan Gaiab. Neptunei. God of fresh water and seaii. Brother of Jupiter and PlutoII. Chapter 13 Section 1 Discovery of Uranus and Neptunea. Uranusi. 1st planet to be discovered in more than 2000 yearsii. Seen by W. Herschel in 1781 also with 3 moonsb. Neptunei. Seen in 1846 after studying Uranus` orbitThese 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.ii. Atmosphere is barely visibleIII. Chapter 13 Section 2 Orbital and Physical Propertiesa. Both planets can freeze ammoniab. Uranusi. Mass= 14.5*Earthii. Has a magnetic fieldiii. Moons = 27iv. Is 20 astronomical units away from the Sunv. 84.3 earth year orbitvi. Axial tilt = 97.8 degrees1. Axis rotation lies on the plane of orbit2. Tilt probably due to multiple impacts when Uranus was formingvii. 17.25 hour rotation periodviii. Gravity = .886ix. Flattening= .017x. Seasonal variations are extremexi. Has faint ringsc. Neptunei. Moons = 14ii. 30 astronomical unitsiii. 164.8 earth year orbitiv. Composition= Helium, Neptunian, carbohydrates and otherv. Band structure is more visiblevi. Dark spot is similar to Jupiter`s
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