Asteroids Powerpoint

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Asteroids

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  • Asteroids Powerpoint

    1. 1. Asteroids Murphy McGraw
    2. 2. What they are <ul><li>Rocky and metallic objects that orbit the Sun but are too small to be considered planets </li></ul><ul><li>No atmospheres </li></ul><ul><li>Diverse group of small celestial bodies in the solar system </li></ul><ul><li>Known as &quot;minor planets&quot; </li></ul><ul><li>Made of rock and metal </li></ul>
    3. 3. History <ul><li>65 million years ago </li></ul><ul><li>1801 – Ceres </li></ul><ul><li>June 30, 1908 </li></ul><ul><li>Theories on chemicals </li></ul>
    4. 4. Why study them? <ul><li>Where are they? Could they strike earth (again?) </li></ul><ul><li>Mineral Resources </li></ul><ul><li>Formation of the Solar System and our own Earth. </li></ul>
    5. 5. How to study them <ul><li>Telescopes </li></ul><ul><li>Spectroscopes </li></ul><ul><li>Rockets </li></ul><ul><li>Spacecrafts </li></ul><ul><li>Six space missions </li></ul><ul><li>Laboratory analysis of meteorites </li></ul>
    6. 6. Types <ul><li>C-type </li></ul><ul><li>S-type </li></ul><ul><li>M-type </li></ul><ul><li>Rare types </li></ul>
    7. 7. How they are classified <ul><li>Classified by Aledo </li></ul><ul><li>Composition derived from spectral features in their reflected sunlight </li></ul><ul><li>Inferred similarities to known meteorite types </li></ul>
    8. 8. Where they are located <ul><li>Asteroid Belt Between the orbits of Mars and Jupiter </li></ul><ul><li>Near-Earth Asteroids (NEAs) </li></ul><ul><ul><li>Amors </li></ul></ul><ul><ul><li>Apollos </li></ul></ul><ul><ul><li>Atens </li></ul></ul><ul><li>Trojans </li></ul>
    9. 9. Sizes and Shapes <ul><li>All different shapes and sizes </li></ul><ul><li>Nearly spherical (Ceres) </li></ul><ul><li>Very irregular (Eros, most others) </li></ul><ul><li>Size ranging- very small (rocks)  very large (minor planets) </li></ul>
    10. 10. Bibliography / Questions? <ul><li>http://nssdc.gsfc.nasa.gov/planetary/text/asteroids.txt </li></ul><ul><li>http://www.nineplanets.org/asteroids.html </li></ul><ul><li>http://en.wikipedia.org/wiki/Asteroid </li></ul><ul><li>http://dawn.jpl.nasa.gov/DawnCommunity/flashbacks/fb_12.pdf </li></ul><ul><li>http://www.noao.edu/education/asteroids/ </li></ul>

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