(n.) An atmosphere of rare matter, composed principally of incandescent hydrogen gas, surrounding the sun and enveloping the photosphere. Portions of the chromosphere are here and there thrown up into enormous tongues of flame.
Example Sentences:
Photosphere
Definition:
(n.) A sphere of light; esp., the luminous envelope of the sun.
Example Sentences:
(1) Being more than 1,000C colder than the 5,500C of most of the visible Sun's surface, the photosphere, they are darker and stand out by contrast.