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Arts & crafts
Arts & crafts comprises a multitude of activities and hobbies that involve making things with one's hands, usually from scratch. They can be sub-divided into 'handicrafts'( or traditional crafts ) that are fashioned in an old style using long practised techniques, and the rest which are more modern inventions that have become recent trends or fads.
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Astronomy; General astronomy
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volatile element that tends to be found in the atmosphere of a planet or asteroid
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Astronomy; General astronomy
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atmospheric extinction
Astronomy; General astronomy
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