PPT-Martian Meteorites

Leah Salditch February 27 2017 Mars Final Project 3 main types of meteorites Iron StonyIron Pallasite Mesosiderite Stony Chondrites Achondrites Pallasite Achondrites Basaltic Common comprise 5 of all meteorite findings . Nadine G. Barlow. Dept. Physics and Astronomy. Northern Arizona University. Flagstaff, AZ 86011-6010. Nadine.Barlow@nau.edu. Office: 928-523-5452 Cell: 928-600-9253. Co-authors: Joseph M. Boyce (U. HI) and Lionel Wilson (Lancaster U.). Unit 4. Appearances of comet Kohoutek (1973), Halley (1986), and Hale-Bopp (1997) caused great concern among superstitious.. Comet Hyakutake in 1996. Throughout history, comets have been considered as portents of doom, even very recently: . Meteorites hit the atmosphere with speeds from 12 to 72 km/. s. .. Earth’s orbital speed is 30 km/. s. and the escape speed from the solar system at the Earth is 42 km/. s. Q: draw a diagram and use it to show why the maximum speed is 72 km/. Asteroids. Composition (what are they made of?. Asteroids are rocky worlds.. Asteroids. Where are asteroids found?. Most asteroids orbit the Sun between Mars and Jupiter.. Asteroids. What are their shapes?. A. . Pasewaldt. 1. , . K. . Willner. 2. , . J. . Oberst. 1,2. , . Frank . Scholten. 1. , . M. . Wählisch. 1. , . K.-D. . Matz. 1. , . T. . Roatsch. 1. , . H. . Hoffmann. 1. , . A. . Grechishev. 3. . Terrestrial Ages of MeteoritesA. J. Timothy JullUniversity of Arizona The terrestrial age, or the terrestrial residence time of a meteorite, together with its exposurehistory provides us with useful i Compiled by David Beaty, Lars Borg, David Draper, Walter Kiefer, Jim Papike, Kevin Righter, Chip Shearer, Sue Smrekar, Jeff Taylor . Correspondence author: Dave Beaty . (JPL/Caltech), . David.W.Beaty@jpl.nasa.gov. Geochronometry. Isotope tracing. History . of “primordial” . Pb. Meteorite samples . Chondrite. – a primitive, undifferentiated meteorite. CI refers to a particular class of carbonaceous . chondrite. Preliminary Summary of Strategic Knowledge Gaps . P-SAG (jointly sponsored by MEPAG and SBAG). May 1, 2012. Strategic Knowledge Gaps. 2. The Gap in Knowledge Needed to Achieve a Specific Goal . Knowledge we have. Comets and Their Significance. In the past, people dreaded comets as omens of human disasters such as wars or famines.. Today we know that . comets. are icy members of our solar system that have highly elliptical orbits.. Meteors. Meteorites. Impacts. Meteors, Meteorites and Impacts. I. . Small . Solar System Bodies. Small Solar System Bodies. (SSSB, as defined by the IAU) are objects in the Solar System that are neither . Martian geology: a rapid summary. Mars is geologically distinctive at the large scale. The southern hemisphere is made of ancient cratered terrain and the northern hemisphere flat, more recent (less impacted) terrain that is at lower elevation. This distinctive geology is called the . Geochronometry (methods). Nuclear synthesis. Meteorites. Age of the Earth accretion. Pb . Formation of the core . Formation of the core (energy considerations). Formation of crust. Plate tectonics starts. Tuan Vu (3227). Background. : . Martian . sedimentary rocks show distinctly low thermal inertias . (300-700 Jm. -2. K. -1. s. -1/2. ), which are linked . to the rocky . units. ’ heat . capacity (. C.