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LECTURE 14, OCTOBER 12, 2010 ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT 1ASTR 101-3, FALL 2010.

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Presentation on theme: "LECTURE 14, OCTOBER 12, 2010 ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT 1ASTR 101-3, FALL 2010."— Presentation transcript:

1 LECTURE 14, OCTOBER 12, 2010 ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT 1ASTR 101-3, FALL 2010

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6 HAYABUSA & ITOKAWA Hayabusa is a Japanese mission to the asteroid Itokawa, arrived Sept. 12, 2005 Asteroid is 540 x 270 x 210 meters Images available (see below) Plan is to bring samples of the asteroid surface back to Earth. Arrived June 13, Particles in canister, under analysis. Surface is very rough & studded with boulders 6

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9 a) beyond the orbit of Neptune. b) between Earth and the Sun. c) between Mars and Jupiter. d) in the orbit of Jupiter, but 60 degrees ahead or behind it. e) orbiting the jovian planets in captured, retrograde orbits. Most asteroids are found Question 7

10 a) beyond the orbit of Neptune. b) between Earth and the Sun. c) between Mars and Jupiter. d) in the orbit of Jupiter, but 60 degrees ahead or behind it. e) orbiting the jovian planets in captured, retrograde orbits. Question 7 Most asteroids are found The Asteroid Belt is located between 2.1 and 3.3 A U from the Sun.

11 Question 8 The asteroid belt is evidence of a) a planet that once orbited the Sun but later was destroyed. b) ancient material from the formation of the solar system. c) a collision between Jupiter and one of its larger moons. d) comets that were trapped by Jupiter’s gravitational field.

12 Question 8 The asteroid belt is evidence of a) a planet that once orbited the Sun but later was destroyed. b) ancient material from the formation of the solar system. c) a collision between Jupiter and one of its larger moons. d) comets that were trapped by Jupiter’s gravitational field. Asteroids, meteoroids, and comets may have not changed at all since the solar system formed.

13 DAWN MISSION Launch, September 27, Used Mars gravity assist. Will orbit TWO bodies. VESTA-In orbit, Large asteroid, major crater that yielded meteorites (HEDs). Size 550 km X 462 km. CERES-In orbit, Dwarf planet and largest asteroid. Nearly spherical. Diameter 950 km. ASTR 101-3, FALL

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15 ASTR 101-3, FALL 2010 REMEMBER ! Meteorites are a major source of abundance information for the solar system The age of the solar system comes from radioactive dating of elements in “chondrules” in carbonaceous chondrites. The age is 4.56 x 10 9 years. The chondrules are estimated to have formed very quickly in the early solar system. The age is a crystallization age. 15

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21 REVIEW, CHAPTER 4 THE SOLAR SYSTEM Properties-Terrestrial vs. Jovian Planets Comets-Nucleus, H-Cloud, Tails, DEs Comet Reservoirs-Kuiper Belt, Oort Cloud Meteorites, Impacts/Craters Asteroids, Meteor Showers Formation Scenario, Age ASTR 101-3, FALL

22 REVIEW, CHAPTER 5 EARTH AND ITS MOON Interior structure, Seismic Wave, Continental drift Earth-Moon system, Tides, Formation of Moon Earth atmosphere, Global Warming, Ozone hole Lunar surface, Impacts Earth’s magnetosphere ASTR 101-3, FALL

23 REVIEW, CHAPTER 6 THE TERRESTRIAL PLANETS Rotations Mercury-surface and atmosphere Venus-surface and atmosphere Mars-surface and atmosphere Water on Mars Evolution of atmospheres ASTR 101-3, FALL

24 REVIEW, CHAPTER 7 THE JOVIAN PLANETS General properties, Gravitational “slingshots” Jupiter-atmosphere (Great Red Spot), interior- (metallic hydrogen) Discovery of Uranus & Neptune, Seasons Saturn-atmosphere and helium rain Magnetospheres ASTR 101-3, FALL

25 REVIEW, CHAPTER 8 MOONS, RINGS, AND PLUTOIDS Galilean Moons-Io, Europa, Ganymede, and Callisto Moons of Saturn-Tital and Enceladus Rings and Roche Limit, Triton Pluto story Kuiper Belt objects and Trans-Neptunian Objects ASTR 101-3, FALL


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