Christmas wiki:
[mas (literally, the Mass of Christ) is a holiday in the Christian calendar, usually observed on December 25, which celebrates the birth of Jesus. According to the Christian gospels, Jesus was born to Mary in Bethlehem, where she and her husband Joseph had traveled to register in the Roman census. Christ's birth, or nativity, was to fulfill the prophecies of Judaism that a messiah would come, from the house of David, to redeem the world from sin. Early Christians celebrated more the subsequent Epiphany, when the baby Jesus was visited by the Magi (and this is still a primary time for celebration in Spain). Efforts to assign a date for his birth, though better known from Writings from some centuries later, would have been important to all Christians then, no less than now. The precise chronology of Jesus' birth and death as well as the historicity of Jesus are still debated.
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Sky wiki:
>For other uses, see Sky (disambiguation). The sky is (roughly) that part of the atmosphere or of outer space visible from the surface of the earth (or any other planet; see Skies of other planets).). Birds, airplanes, and kites are often considered to fly in the sky. It is difficult to define precisely for several reasons. During daylight the sky has the appearance of an opaque blue surface, but this is the result of the air refracting sunlight. There is no "blue object" above the earth in any normal sense, so it is hard to say what object the sky is. The sky is thus sometimes defined as the denser gaseous zone of a planet's atmosphere. At night the sky has the appearance of a black surface or region scattered with stars. But if we then say that the sky is the entire visible universe, it would not be the same thing we see during the day.
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