cir·​cum·​stel·​lar | \ ˌsər-kəm-ˈste-lər How to pronounce circumstellar (audio) \

Definition of circumstellar

: surrounding or occurring in the vicinity of a star circumstellar dust

Examples of circumstellar in a Sentence

Recent Examples on the Web Hubble was able to spot circumstellar material around the star shortly after the explosion. Ashley Strickland, CNN, 21 Oct. 2021 As material continues to gently fall onto the central proto-star, a circumstellar disk emerges around it. Ethan Siegel, Forbes, 16 Apr. 2021 Planets form from a disk of gas and dust around a star, called the circumstellar disk. Ashley Strickland, CNN, 14 Sep. 2020 This is where planets form, and it's called the circumstellar disk. Ashley Strickland, CNN, 3 Sep. 2020 Meanwhile the study of circumstellar disks and planet formation has exploded. Meredith A. Macgregor, Scientific American, 19 May 2020 This band is called the circumstellar habitable zone (CHZ) and has become one of the central ideas driving scientists’ thoughts about life on exoplanets. James Trefil And Michael Summers, Smithsonian Magazine, 31 Dec. 2019 Called circumstellar disks, these structures are the milieu in which planets form—although the exact process by which worlds emerge from the dust is unknown. Nadia Drake, National Geographic, 12 July 2019 The newborn star lit up with nuclear fusion, sending light and heat out into the spinning circumstellar disk. Sarah Kaplan,, 3 July 2018

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

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First Known Use of circumstellar

1951, in the meaning defined above

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The first known use of circumstellar was in 1951

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circumstellar disk

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Last Updated

23 Nov 2021

Cite this Entry

“Circumstellar.” Dictionary, Merriam-Webster, Accessed 27 Nov. 2021.

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