photosphere

Definitions

  • WordNet 3.6
    • n photosphere the intensely luminous surface of a star (especially the sun)
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Webster's Revised Unabridged Dictionary
    • n Photosphere A sphere of light; esp., the luminous envelope of the sun.
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Century Dictionary and Cyclopedia
    • n photosphere An envelop of light; specifically, the luminous envelop, supposed to consist of incandescent matter, surrounding the sun. According to Kirchhoff, the sun's photosphere is either solid or liquid, and is surrounded by an extensive atmosphere, composed of gases and vapors of the substances incandescent in the photosphere. According to the view now more generally accepted, the photosphere is a shell of luminous cloud —that is, the solid or liquid particles which produce the light are minute, and disseminated through the lower strata of the solar atmosphere.
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Chambers's Twentieth Century Dictionary
    • n Photosphere fō′tō-sfēr the luminous envelope round the sun's globe, which is the source of light.
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Etymology

Webster's Revised Unabridged Dictionary
Photo-, + sphere,
Chambers's Twentieth Century Dictionary
Gr. phōs, phōtos, light, sphaira, a sphere.

Usage

In literature:

This distribution at the photosphere of the sun.
"Scientific American Supplement, No. 363, December 16, 1882" by Various
PHOTOSPHERE, name given to the luminous atmosphere enveloping the sun.
"The Nuttall Encyclopaedia" by Edited by Rev. James Wood
With a diamond, carborundum or zirconia button the photosphere can be as much as one thousand times the volume of the button.
"Experiments with Alternate Currents of High Potential and High Frequency" by Nikola Tesla
This is the photosphere.
"Recreations in Astronomy" by Henry Warren
Think of an ebon sun fringed with its dazzling photosphere!
"Visionaries" by James Huneker
Below the photosphere lies the vast unknown mass of the unseen solar realm.
"Outlines of the Earth's History" by Nathaniel Southgate Shaler
The maze of her hair could hardly be told from the photosphere.
"Lore of Proserpine" by Maurice Hewlett
Examination of the photosphere shows that the outer surface is never at rest.
"The Outline of Science, Vol. 1 (of 4)" by J. Arthur Thomson
There was a magnetic storm in the photosphere of a sun which was not supposed to have such things.
"Talents, Incorporated" by William Fitzgerald Jenkins
In that distant past, a handful of photons deep in the interior of Sol began their random journey to the photosphere.
"Out Like a Light" by Gordon Randall Garrett
The part of the Sun that we see is its luminous surface, or photosphere.
"Astronomy for Amateurs" by Camille Flammarion
The systematic drift of the photosphere is strictly a drift in longitude; its direction is everywhere parallel to the equator.
"A Popular History of Astronomy During the Nineteenth Century" by Agnes M. (Agnes Mary) Clerke
The dazzling luminous envelope which indicates to the naked eye the boundary of the solar disc is called the PHOTOSPHERE.
"The Astronomy of Milton's 'Paradise Lost'" by Thomas Orchard
Just above the photosphere, and lying close upon it, is a veil of smoke-like haze.
"Astronomy of To-day" by Cecil G. Dolmage
These sun-spots seem to be great holes that have been blown through the photosphere of the sun.
"Electricity and Magnetism" by Elisha Gray
The Sun, then, is in an essentially gaseous condition, enclosed by the luminous shell which we term the photosphere.
"Are the Planets Inhabited?" by E. Walter Maunder
Have you, my friend, ever taken up the subject of the photosphere of the sun?
"A Book of Ghosts" by Sabine Baring-Gould
Dark spots of a deep bluish black will often be seen on the photosphere of the sun.
"Astronomy" by David Todd
The formation of a powerful photosphere is consequently the very means for protecting the electrode.
"The inventions, researches and writings of Nikola Tesla" by Thomas Commerford Martin
The D lines are dark in the sun because the photosphere is much hotter than the reversing layer.
"Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2" by Various
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In news:

A full disk image of the Sun showing a few sunspot groups in the photosphere.
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In science:

Evolution of Stars: The Photospheric Abundance Iben, I.
Rotational Evolution During Type I X-Ray Bursts
Press), 179 Sackmann, I.-J., & Boothroyd, A. I. 1991, in Evolution of Stars: The Photospheric Abundance Connection, ed. G.
Rotational Evolution During Type I X-Ray Bursts
These spectral windows occur where we would expect to observe the redshifted photons from the two most prominent galaxy emission features: the stellar photospheric peak at λ ∼ 1 µm and the one at λ ∼ 100 µm due to dust re-radiation.
High-Redshift Galaxies: The Far-Infrared and Sub-Millimeter View
The only photospheric line clearly identified is He II 1640˚A.
FUSE Spectroscopy of the Two Prototype White Dwarfs With Signatures of a Super-hot Wind
The only photospheric lines that can be identified in both ob jects are from S VI and P V (Fig. 1).
FUSE Spectroscopy of the Two Prototype White Dwarfs With Signatures of a Super-hot Wind
Inside the photosphere the radiation and matter are considered to be continuously distributed and coupled with each other.
Photon Emission in a Cascade from Relativistic Protons Initiated by Residual Thermal Photons in Gamma-Ray Bursts
The photosphere and photospheric temperatures in this case were well studied by M´esz´aros, Rees (2000).
Photon Emission in a Cascade from Relativistic Protons Initiated by Residual Thermal Photons in Gamma-Ray Bursts
Thus, in the Continuous Model, too, efficient photopion production occurs around the photosphere.
Photon Emission in a Cascade from Relativistic Protons Initiated by Residual Thermal Photons in Gamma-Ray Bursts
Threshold energy of the photopion production, Ep,τ , at the photosphere in the Continuous Case for ∆7 = 1.
Photon Emission in a Cascade from Relativistic Protons Initiated by Residual Thermal Photons in Gamma-Ray Bursts
In the Discrete Model, photons are confined within multiple thin shells, while in the Continuous Model, photons are emitted from the wind photosphere.
Photon Emission in a Cascade from Relativistic Protons Initiated by Residual Thermal Photons in Gamma-Ray Bursts
The abscissa is the depth z = r − R⊙ where R⊙ is the radius at the photosphere.
Numerical constraints on the model of stochastic excitation of solar-type oscillations
The model extends from the photosphere into the outer heliosphere (truncated at 4 AU for convenience).
Coronal Heating versus Solar Wind Acceleration
The bottom boundary condition on the power spectrum of transverse fluctuations came from measurements of Gband bright point motions in the photosphere (e.g., Nisenson et al. 2003).
Coronal Heating versus Solar Wind Acceleration
Grevess & Sauval (1999) solar photosphere model was used.
About the chemical composition of delta Scuti - the prototype of the class of pulsating variables
The code performs an estimation of the ejected envelope parameters from a simultaneous comparison of the observed and computed light curve, photospheric gas velocity and continuum temperature.
A Study of the Type II-P Supernova 2003gd in M74
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