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Neighbors With Nothing in Common 13 27 Although Mars and Jupiter orbit the same sun, both planets could hardly be more different. Mars, the fourth planet from the Sun, is smaller than Earth. Jupiter, the fifth planet from the Sun, is by far the largest planet in the solar system. 43 50 A tiny flicker in Earth’s dark sky, Mars is a globe of red mountains high. 58 71 86 101 120 Mars, like Earth, has a solid surface covered in mountains, hills, plains, valleys, and ridges. Its tallest mountain towers 15 miles high. A thin layer of carbon dioxide surrounds the planet. Mars is a cold, dry place. It does, however, have some water in the form of ice at its poles. The planet is similar enough to Earth that it is possible that people may venture there someday. 126 132 138 155 171 185 A trip to Jupiter, on the other hand, is not likely. Jupiter is made up of several layers of boiling-hot gases and liquids. It has a rocky core, but most of the planet is magnetic liquid hydrogen. The visible part of Jupiter is its colorful cloud layer, made mostly of frozen ammonia and water. 192 Mars and Jupiter may be neighbors, but the similarity ends there. 203 210 Two planets all on Earth can see, As different as neighbors can ever be. Jupiter glows bright with colossal mass, A globe of stormy, swirling gas. Title: Neighbors with Nothing in Common | © 2009-2012 Wireless Generation, Inc. All rights reserved. Grade: 6