first notes - ISP 205 Chapter One Reading Notes 1. The...

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ISP 205 Chapter One Reading Notes 1. The earth is a planet in our solar system which consists of the Sun and all the objects that orbit it , the planets and their moons Typical galaxy: collection of a few hundred million to a trillion or more stars, bound together by gravity. The sun and all the stars we see with the naked eye make up only a small part of a huge disk shaped collection of stars call the MILKY WAY GALAXY. Large containing more than 100 billions stars 2. The entire universe is expanding, average distances between galaxies are increasing. - the universe is about 14 billions years old -observable universe contains at least 100 billion galaxies, the total # of stars in the observable universe is roughly the same number of the grains of dry sand on all the beaches of the Earth Universe: the sum total of all matter and energy Galaxies: recycle material from one generation of stars to the next, and without this recycling we could not exist.
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This note was uploaded on 04/03/2008 for the course ISP 205 taught by Professor Donahue during the Fall '08 term at Michigan State University.

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first notes - ISP 205 Chapter One Reading Notes 1. The...

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