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Mars One of the five planets visible to the naked eye (Jupiter, Venus, Mercury, Saturn, and Mars). Usually Mars is not particularly bright, so is not special for navigation, but it does go through periods every few years of being very bright, as in mid 2003. Mars usually appears reddish when viewed through binoculars. All planets appear as tiny disks when viewed through binoculars, as opposed to stars which are always points of light.

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