from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The visible outer layer of a star, especially of the sun.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A visible surface layer of a star, and especially that of a sun.
from the GNU version of the Collaborative International Dictionary of English
- n. A sphere of light; esp., the luminous envelope of the sun.
from The Century Dictionary and Cyclopedia
- n. An envelop of light; specifically, the luminous envelop, supposed to consist of incandescent matter, surrounding the sun.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the intensely luminous surface of a star (especially the sun)
The surface layer of the Sun that we can see is called the photosphere and has a temperature of about 5800 degrees Kelvin.
But compressed gas in the thicker, denser part of the Sun mashes together all those energies, spreading them out, so it emits white light (that layer of the Sun is called the photosphere).
The photosphere is the surface that emits solar radiation to space.
This paper suggests that plasma motion in an active region in the photosphere is the source of large electric currents.
An elastic fluid, now known as the photosphere, is in course of continual formation on the dark rugged surface of the solar mass; and rising, on account of its specific lightness, it forms the pores in the stratum of reflecting clouds; then, combining with other gases, it produces the irregularities or furrows in the luminous cloud-region.
What we observe is the surface-layer, the so-called photosphere, in which the cold of space produces the condensation of the gases into those luminous clouds which we see in our drawings and photographs as "rice grains" or "willow leaves."
The surface of the Sun, known as the photosphere, reaches temperatures of 5,000 degrees.
The cloud-like character which he attributed to the radiant shell of the sun (first named by Schröter the "photosphere") is borne out by all recent investigations; he observed its mottled or corrugated aspect, resembling, as he described it, the roughness on the rind of an orange; showed that "faculæ" are elevations or heaped-up ridges of the disturbed photospheric matter; and threw out the idea that spots may ensue from an excess of the ordinary luminous emissions.
The temperature minimum region extends from the photosphere up to 2000 kilometers and has a temperature of about 4000 degrees Kelvin.
Above the photosphere are five layers that compose the Suns atmosphere.