celestial sphere


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

Buying Guide

Study celestial bodies with the best telescopes for beginners from our Reviews team.

Learn More About celestial sphere

Time Traveler for celestial sphere

Time Traveler

The first known use of celestial sphere was in 1829

See more words from the same year

Dictionary Entries Near celestial sphere

celestial pole

celestial sphere

Celestial Teacher

See More Nearby Entries 

Statistics for celestial sphere

Cite this Entry

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

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on celestial sphere

Britannica.com: Encyclopedia article about celestial sphere


Test Your Vocabulary

Words Named After People

  • name tags
  • Namesake of the leotard, Jules Léotard had what profession?
Spell It

Can you spell these 10 commonly misspelled words?

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!