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Unformatted text preview: Each of the above differs from the next by a factor of 1,000. From the Powers of 10 video: these go in the order of smallest to largest Planetary System o We started with the earth and as we backed away we saw star(s), planets, minor bodies help by gravity o Our Solar System: Sun, 8 planets with moons, dwarf planets, comets, asteroids Galaxy o Collection of stars (some starts have planets and are planetary systems), gas, dust help by gravity o Our Milky Way galaxy contains about 400 billion stars Universe o Galaxies distributed in clusters held by gravity o About 100 billion galaxies Pluto shares its orbit with many icy bodies. It hasnt cleared its orbit and that is why it has been demoted. Our MILKY WAY GALAXY We live in an immense universe comprised of billions of galaxies. Each galaxy contains billions of stars and many stars have planets....
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- Spring '10