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 The Parker probe saw the entire thing—from the CME's generation, to its emission from the sun's surface (or photosphere), to its propagation in the space between our star and our planet. Rebecca Boyle, Scientific American, 1 Mar. 2024 Solar prominences, explains NASA, are large, bright loops of plasma anchored to the Sun's surface in the photosphere — the visible surface of the Sun — that extend into the Sun's outer atmosphere. John Tufts, The Indianapolis Star, 10 Apr. 2024 Here’s how to view it According to The National Solar Observatory, the corona is the area of plasma, or highly ionized gas, that extends thousands of miles above the sun’s visible surface, called the photosphere. Sean Krofssik, Hartford Courant, 21 Mar. 2024 The outermost layers are the photosphere (the bright surface), the chromosphere, the transition region and the corona. Rebecca Boyle, Scientific American, 1 Mar. 2024 See all Example Sentences for photosphere 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'photosphere.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 19 Aug. 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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