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Mars

Mars, in astronomy, 4th planet from the sun, with an orbit next in order beyond that of the earth.

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The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved.

More on in astronomy Mars from Infoplease:

Percival Lowell - Lowell, Percival Lowell, Percival, 1855–1916, American astronomer, b. Boston, grad. Harvard, ...

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