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A Siemens star, or spoke target, is a device used to test the resolution of optical instruments, printers, and displays. It consists of a pattern of bright "spokes" on a dark background that radiate from a common center and become wider as they get further from it.
A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
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The EURion constellation is made up of five rings. The EURion constellation (also known as Omron rings [1] or doughnuts [2]) is a pattern of symbols incorporated into a number of secure documents such as banknotes, cheques, and ownership title certificate designs worldwide since about 1996.
An asterism is an observed pattern or group of stars in the sky. Asterisms can be any identified pattern or group of stars, and therefore are a more general concept than the 88 formally defined constellations. Constellations are based on asterisms, but unlike asterisms, constellations outline and today completely divide the sky and all its ...
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The Stella d'Italia ("Star of Italy"), popularly known as Stellone d'Italia ("Great Star of Italy"), [14] is a five-pointed white star, which has symbolized Italy for many centuries. It is the oldest national symbol of Italy , since it dates back to Graeco-Roman mythology [ 13 ] when Venus , associated with the West as an evening star, was ...
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