photosphere

noun

pho·​to·​sphere ˈfō-tə-ˌsfir How to pronounce photosphere (audio)
1
: a sphere of light or radiance
2
: the luminous surface layer of the sun or a star
photospheric adjective

Examples of photosphere in a Sentence

Recent Examples on the Web
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The images, obtained in March 2023 by the European Space Agency's Solar Orbiter, represent what the agency says are the highest-resolution views of the sun's surface, known as the photosphere, to date. Laura L. Davis, USA TODAY, 25 Nov. 2024 Nearly all radiation from the sun originates from the photosphere, with sizzling temperatures ranging between 8,132 and 10,832 degrees Fahrenheit (4,500 and 6,000 degrees Celsius). Ashley Strickland, CNN, 20 Nov. 2024 In Visible Light This image of the sun's surface — its photosphere — was taken in visible light. Jamie Carter, Forbes, 27 Nov. 2024 The image above reveals the glowing, churning hot plasma comprising the sun's photosphere. Eric Lagatta, USA TODAY, 25 Nov. 2024 See all Example Sentences for photosphere 

Word History

Etymology

photo- + -sphere; in sense 2 probably as translation of German Lichtatmosphäre

First Known Use

1664, in the meaning defined at sense 1

Time Traveler
The first known use of photosphere was in 1664

Dictionary Entries Near photosphere

Cite this Entry

“Photosphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/photosphere. Accessed 21 Dec. 2024.

Kids Definition

photosphere

noun
pho·​to·​sphere ˈfōt-ə-ˌsfi(ə)r How to pronounce photosphere (audio)
: the shining surface of the sun or a star
photospheric adjective

More from Merriam-Webster on photosphere

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