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An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (on the celestial sphere ), consisting of a spherical framework of rings, centered on Earth or the Sun, that represent lines of celestial longitude and latitude and other astronomically important features, such as the ecliptic.
Dyson sphere. A hypothetical depiction of a Dyson swarm surrounding a star. Freeman Dyson, the first scientist to explore the concept. A Dyson sphere is a hypothetical megastructure that encompasses a star and captures a large percentage of its solar power output. [ 1][ 2][ 3] The concept is a thought experiment that attempts to imagine how a ...
Christmas lights in Verona, Italy. Christmas lights (also known as fairy lights, festive lights or string lights) are lights often used for decoration in celebration of Christmas, often on display throughout the Christmas season including Advent and Christmastide. The custom goes back to when Christmas trees were decorated with candles, which ...
When sourcing the best outdoor Christmas lights for 2023, we included solar-powered, battery-operated, and plug-in options in every style. Shop our picks now!
In Greek antiquity the ideas of celestial spheres and rings first appeared in the cosmology of Anaximander in the early 6th century BC. [7] In his cosmology both the Sun and Moon are circular open vents in tubular rings of fire enclosed in tubes of condensed air; these rings constitute the rims of rotating chariot-like wheels pivoting on the Earth at their centre.
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Although he is most prominently known for his decades-long rap career and being everyone’s “uncle,” Snoop Dogg has proven his talent extends beyond what he does in the recording studio.
Christmas tree decorated with lights, stars, and glass balls Glade jul by Viggo Johansen (1891) Typical North American family decorating Christmas tree (c. 1970s) A Christmas tree is a decorated tree, usually an evergreen conifer, such as a spruce, pine or fir, or an artificial tree of similar appearance, associated with the celebration of ...