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قراءة كتاب Encyclopaedia Britannica, 11th Edition, "Mars" to "Matteawan" Volume 17, Slice 7
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Encyclopaedia Britannica, 11th Edition, "Mars" to "Matteawan" Volume 17, Slice 7
tag="{http://www.w3.org/1999/xhtml}a">MATHERAN

MARS, in astronomy, the fourth planet in the order of distance from the sun, and the next outside the earth. To the naked eye it appears as a bright star of a decidedly reddish or lurid tint, which contrasts strongly with the whiteness of Venus and Jupiter. At opposition it is brighter than a first magnitude star, sometimes outshining even Sirius. It is by virtue of its position the most favourably situated of all the planets for observation from the earth. The eccentricity of its orbit, 0.0933, is greater than that of any other major planet except Mercury. The result is that at an opposition near perihelion Mars is markedly nearer to the earth than at an opposition near aphelion, the one distance being about 35 million miles; the other 63 million. These numbers