Definition of photosphere
1 : a sphere of light or radiance
2 : the luminous surface layer of the sun or a star
Read the Latest from M-W
Recent Examples of photosphere from the Web
-
But just a few hundred miles above the photosphere, in the star's corona, the temperature suddenly jumps to several million degrees.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'photosphere'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of photosphere
1664
Learn More about photosphere
-
See words that rhyme with photosphere Britannica.com: Encyclopedia article about photosphere
Seen and Heard
What made you want to look up photosphere? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!