photosphere
noun
pho·to·sphere
ˈfō-tə-ˌsfir 
1
: a sphere of light or radiance
2
: the luminous surface layer of the sun or a star
Examples of photosphere in a Sentence
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The timelapse highlights changes in brightness and structure within the corona, which become easier to observe when the sun's photosphere is completely blocked.
—
Samantha Mathewson, Space.com, 10 Apr. 2026
When the bright photosphere is hidden, light levels plunge.
—Jamie Carter, Forbes.com, 12 Feb. 2026
The area of plasma, or highly ionized gas, extends thousands of kilometers above the sun’s visible surface, called the photosphere.
—Jenna Prestininzi, Freep.com, 20 Jan. 2026
The Sun has very little of these elements present in its photosphere, but the Moon’s crust and regolith is almost exclusively composed of these heavier elements.
—Ethan Siegel, Big Think, 4 Sep. 2025
See All Example Sentences for photosphere
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Samantha Mathewson, Space.com, 10 Apr. 2026
When the bright photosphere is hidden, light levels plunge.
—Jamie Carter, Forbes.com, 12 Feb. 2026
The area of plasma, or highly ionized gas, extends thousands of kilometers above the sun’s visible surface, called the photosphere.
—Jenna Prestininzi, Freep.com, 20 Jan. 2026
The Sun has very little of these elements present in its photosphere, but the Moon’s crust and regolith is almost exclusively composed of these heavier elements.
—Ethan Siegel, Big Think, 4 Sep. 2025
See All Example Sentences for photosphere
Cite this Entry
“Photosphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/photosphere. Accessed 19 Apr. 2026.
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