Definition of hour circle
: a circle on the celestial sphere that passes through both celestial poles
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Recent Examples of hour circle from the Web
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Instead of storming the stores or spending hours circling some parking garage, everyone would take a long winter’s nap.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hour circle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of hour circle
1690
Learn More about hour circle
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Britannica.com: Encyclopedia article about hour circle
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