Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Terrestrial Planets - Physics & Astronomy | SFASU
Document related concepts
Transcript
Terrestrial Planets Mercury Similar Bodies Moon Mercury Discovery Scarf Scarf Formation Movie Caloris Basin Mercury’s Interior Mercury’s Formation Mercury Formation Venus Pancake Volcanoes Eruptions of very thick lava Sif Mons Active volcano Coronae Collapsed volcanic domes The Surface of Venus Venus 1 Venus 2 Interior of Venus Seismic Waves in the Earth S Waves (transverse) Epicenter P Waves Inner Core Outer Core S Waves Mantle P Waves (longitudinal) Interior of the Earth Inner Core Mantle Outer Core Crust Interior Composition and Temperature Mantle Convection Plate Tectonics Mid-Atlantic Ridge San Andreas Fault Island Chains Movie Craters Erosion Double Planet The Moon On the Surface Lunar Maria Basalts Lunar Highlands Breccias Structure Lunar Origin Fission Earth-Moon formed as one, rapidly rotating body. Moon spun off of Earth Pro Average density matches Volume of Moon = Volume of Pacific Ocean basin Con Can’t account for differences in composition Lunar Origin Capture Moon formed elsewhere and was captured on close approach Pro can account for composition differences Con very difficult to capture in a nearly circular orbit Lunar Origin Binary Accretion Earth and Moon formed together but as separate bodies Pro might be able to explain differences in composition Con most models are stretched to accommodate this idea Lunar Origin Collisional Accretion (Giant Impact) Mars-sized body collided with the Earth. The collision spun off part of the mass which became the Moon. Mars Percival Lowell’s Mars Cratered Terrain Sinuous Channels Valles Marineris The Tharsis Volcanoes Viking Mars Pathfinder Spirit Rover Martian Sunset Mars Interior Life on Mars? In 1996, a team of U.S. scientists said they had discovered evidence of ancient, singlecell life on Mars in remains from a meteorite that plunged to Earth 13,000 years ago. Face on Mars? 1997 1976 Moons of Mars Phobos Deimos End of Section
