Note that in the case of an astronomical crescent, such as the moon observed in the sky, the outer arc will be 180 ° ( a half-circle as previously mentioned ), while the Islamic crescent symbol ( Arabic هلال hilāl ) is often shown with an outer arc significantly greater than 180 ° ( as seen in the illustrations below ).

Note that in the case of an astronomical crescent, such as the moon observed in the sky, the outer arc will be 180 ° ( a half-circle as previously mentioned ), while the Islamic crescent symbol ( Arabic هلال hilāl ) is generally shown with an outer arc significantly greater than 180 ° ( as seen in the illustrations here ).

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