Lecture 7 - The Solar System

Nature of the universe astronomy the solar system

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Unformatted text preview: of terrestrial and jovian planets Terrestrial inner solar system smaller masses and radii high density rocky, solid surface slower rotation, weak magnetic field no/few moons, no rings Jovian outer solar system larger masses and radii low density gaseous faster rotation, strong magnetic field many moons, rings 11 NATURE of the Universe Astronomy - The Solar System Interplanetary Matter How did the planets form and get these physical properties? Is there any "rubble" left over from the construction period? Kuiper belt objects in the outer solar system Asteroids in the inner solar system 12 see http://www.ifa.hawaii.edu/faculty/jewitt/kb.html for more information on the Kuiper belt. NATURE of the Universe Astronomy - The Solar System Interplanetary Matter About 136,500 asteroids have been catalogued and named to date. Their sizes range from about 10 m up to almost 1,000 km. Most asteroids, though, are relatively small (<500 m). The total mass of the asteroid belt is about 1/1000 of the mass of Earth. Hence even the asteroid belt is a quite empty space. 13 Asteroids are cataloged by the Minor Planet Center - http://cfa-www.harvard.edu/iau/ mpc.html NATURE of the Universe Astronomy - The Solar System Interplanetary Matter Close-up on some near-Earth asteroids, main-belt asteroids and dwarf planets Ceres Pluto 950 km 2,300 km 33 km Asteroids are irregular shaped and have cratered surfaces. Dwarf planets are spherical. 14 Ceres: http://hubblesite.org/newscenter/newsdesk/archive/releases/2005/27/text/ Pluto: http://antwrp.gsfc.nasa.gov/apod/ap010319.html NATURE of the Univ...
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This note was uploaded on 10/13/2008 for the course ASTR 3 taught by Professor Hauser during the Fall '07 term at UCLA.

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