celestial sphere

noun

Definition of celestial sphere

: an imaginary sphere of infinite radius against which the celestial bodies appear to be projected and of which the apparent dome of the visible sky forms half

Examples of celestial sphere in a Sentence

Recent Examples on the Web Arkani-Hamed considers the fact that concepts of space and time break down on the celestial sphere to be a feature, not a bug. Katie Mccormick, Quanta Magazine, 12 Jan. 2022 Declination and right ascension are the two primary axes of the celestial sphere. Reece Rogers, Wired, 19 Dec. 2021 As for how the researchers deduce from where on the celestial sphere such gravitational waves originate? Bruce Dorminey, Forbes, 10 Nov. 2021 Next imagine that the orange expands until its completely fills the celestial sphere. Curtis Roelle, baltimoresun.com/maryland/carroll, 6 Mar. 2021 That's because it's located so far south on the celestial sphere. Star Tribune, 14 Feb. 2021 Such imagery represents an incredible angular resolution of better than 0.001 second of arc (there are 3,600 seconds of arc in one degree, and the entire celestial sphere is 360 degrees). Mark J. Reid, Scientific American, 17 Mar. 2020 The classical celestial spheres, depicted in a 17th century engraving. Adam Kirsch, WSJ, 28 June 2019 Together, the cameras will stare at a vertical strip of the celestial sphere stretching from the pole to the equator, proceeding to a new strip every 27 days. Amina Khan, latimes.com, 13 Apr. 2018 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'celestial sphere.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of celestial sphere

1829, in the meaning defined above

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The first known use of celestial sphere was in 1829

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Dictionary Entries Near celestial sphere

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celestial sphere

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Cite this Entry

“Celestial sphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/celestial%20sphere. Accessed 2 Jul. 2022.

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More from Merriam-Webster on celestial sphere

Britannica.com: Encyclopedia article about celestial sphere

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