airglow

noun
air·​glow | \ ˈer-ˌglō How to pronounce airglow (audio) \

Definition of airglow

: light that is observed especially during the night, that originates in the high atmosphere of a planet (such as the earth), and that is associated with photochemical reactions of gases caused by solar radiation

Examples of airglow in a Sentence

Recent Examples on the Web While the clouds and airglow features changed, the swoosh remained. Steven D. Miller, The Conversation, 26 Aug. 2021 In order for those faint galaxies to stand out from the sky’s airglow, astronomers already needed long exposures on the biggest telescopes in the darkest sites available. Joshua Sokol, Science | AAAS, 28 Mar. 2021 Atmospheric airglow, and red and green aurorae from atomic oxygen. Lee Billings, Scientific American, 20 Dec. 2016 As Danny Lewis reported for Smithsonian magazine in 2016, scientists estimate that airglow is about one billion times fainter than sunlight. Nora Mcgreevy, Smithsonian Magazine, 18 June 2020 By studying Mars’ airglow, scientists hope to learn more about its atmosphere. Nora Mcgreevy, Smithsonian Magazine, 18 June 2020 The brightest airglow happens during nighttime, when collisions between oxygen molecules create a bright green glow. Nora Mcgreevy, Smithsonian Magazine, 18 June 2020 The faint greenish-yellow tracing of the upper atmosphere, which is seen above the horizon, is known as airglow. Fox News, 23 Oct. 2019 Three of them look at a phenomena called airglow, the same process that creates the Aurora Borealis and other Earth auroras, but actually happens all around the globe. Richard Tribou, orlandosentinel.com, 9 Oct. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'airglow.' 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 airglow

1949, in the meaning defined above

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The first known use of airglow was in 1949

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Dictionary Entries Near airglow

air gauge

airglow

airgraph

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Cite this Entry

“Airglow.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/airglow. Accessed 27 Jan. 2022.

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Britannica.com: Encyclopedia article about airglow

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