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photosphere
photosphere
photosphere The visible surface of a star, from which most of its energy is emitted in the form of visible and infrared radiation. The name means ‘light sphere’. The Sun's photosphere is a thin layer about 500 km deep. Its temperature decreases steadily from about 6400 K at its base to 4400 K at the
temperature minimum, where it merges with the chromosphere above. This drop in temperature with height causes
limb darkening. The photosphere has a rice-grain texture called
granulation, caused by rising convection cells of hot gas. Other photospheric features include
sunspots,
faculae, and
filigree structures, all associated with strong magnetic fields. Almost all the features of the Sun's visible-light spectrum originate in the photosphere, including the dark Fraunhofer lines.
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1,000 new royalty free stock images at Photosphere.com.
M2 Presswire; 4/9/2003; 700+ words
; M2 PRESSWIRE-9 April 2003-Photosphere.com: 1,000 new royalty free stock images at Photosphere.com(C)1994-2003 M2 COMMUNICATIONS...RDATE:04092003 Blaine, WA -- PRN -- Photosphere.com adds 1,000 new photographs, provides...
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Virtual reality check: a challenger for QuickTime VR enters the arena. (Omniview introduces PhotoSphere desktop video software)(Product Announcement)
Magazine article from: Macworld; 3/1/1996; ; 700+ words
; ...virtual-reality technology called PhotoSphere, from Omniview (423/690...moving in. Like QuickTime VR, PhotoSphere lets multimedia and Web designers...to shoot the original scene), PhotoSphere provides a full 180 degrees so...
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Photosphere expands and redesigns its web site.(Brief Article)
Newspaper article from: Telecomworldwire; 4/10/2003; 618 words
; TELECOMWORLDWIRE-10 April 2003-Photosphere expands and redesigns its web site...www.m2.com Images provider Photosphere Ltd has announced that it has expanded...site can be located at http://www.photosphere.com and offers print, web and multimedia...
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The solar photosphere: evidence for condensed matter.
Magazine article from: Progress in Physics; 4/1/2006; ; 700+ words
; ...much like an ideal gas, wherein the photosphere is viewed as a sparse gaseous plasma...the proper phase of an object. The photosphere does not lend itself easily to treatment...simply reconciled with a solar body and a photosphere in the condensed state. A discussion...
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 "The Daily Mail (London, England)")
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AMAZING PHOTOSPHERE OFFERS FOR EVERY READER; Left: Circus Street in Bath, and below (l-r) Durham Cathedral, Cambridge, Wells Cathedral, Venice, Royal Albert Hall and Albert Memorial, Millennium Bridge.
Newspaper article from: The Daily Mail (London, England); 12/15/2007; 460 words
; EVERY Mail reader can claim these great offers on unique Photospheres.See todays Weekend magazine for more details of these stunning...printperfect for any home or as a gift for a loved one. The Photospheres have been created by artist and photographer Edward Hill...
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The Observation and Analysis of Stellar Photospheres.
Magazine article from: American Scientist; 7/1/1994; ; 700+ words
; ...typically introduced in courses on stellar atmospheres or "photospheres," those layers of stars we can see from the outside. But...all together in a good chapter on the construction of model photospheres, assuming local thermodynamic equilibrium, radiative equilibrium...
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Stock images for all seasons. (PhotoSphere, Visual Language, PhotoVinci, Artville offer clip-art CDs)(Brief Article)(Product Announcement)
Magazine article from: Macworld; 5/1/1997; 700+ words
; ...category is available now than ever before. Here are some of the latest offerings. * PhotoSphere Images (604/ 876-3206, http://www.photosphere .com) has 25 new royalty-free photography CD-ROM titles for $250 each (online...
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Research on astrophysics detailed by M. Gruszecki and co-authors.
Newspaper article from: Physics Week; 11/11/2008; 630 words
; ...vertical oscillations. We include a dense photosphere-like layer into the physical system...reveal that the inclusion of the dense photosphere-like layer has a significant influence...density contrast between the loop and the photosphere than on the width of the transition...
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Creating the future of color
Magazine article from: Business People; 5/1/2004; ; 700+ words
; ...may never be quite the same again. Photosphere Software, a local company based at...software technology and color programming. Photosphere markets its color visualizer product...are gaining popularity today, giving Photosphere's product an edge over the competition...
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Reports summarize astrophysics study results from R. Grappin and co-researchers.
Newspaper article from: Physics Week; 12/9/2008; 700+ words
; ...imposing the photospheric velocity at the photosphere as a boundary condition for coronal...strong density contrast between the photosphere and the corona. On the other hand...injected into the corona comes from the photosphere, so in principle the coronal loop might...
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photosphere
Book article from: The Columbia Encyclopedia, Sixth Edition
photosphere luminous, apparently opaque layer of...surface of the sun or any other star. The photosphere lies between the dense interior gases...chromosphere . The incandescent gases of the photosphere, estimated to be at temperatures near...
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Sun
Encyclopedia entry from: UXL Encyclopedia of Science
...huge amounts of energy in the process. Photosphere: Innermost layer of solar atmosphere...consists of three general layers: the photosphere, the chromosphere, and the corona...of one layer and the end of another. Photosphere. The photosphere, the innermost layer...
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Fraunhofer Lines
Encyclopedia entry from: The Gale Encyclopedia of Science
...the sun, the surface that we see is called the photosphere. The photosphere is a region, several hundred kilometers thick...extends for thousands of kilometers beyond the photosphere, but it is not usually visible from earth. The...
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Sun (Stellar Structure)
Book article from: World of Earth Science
...The surface of the Sun is termed the photosphere. Surrounding the Sun is a solar corona...convective currents of hot gas. The photosphere is the visible outer or surface layer of Sun. At the photosphere, solar temperatures cool to about...
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sun
Book article from: The Columbia Encyclopedia, Sixth Edition
...bright surface of the sun is called the photosphere . Its temperature is about 6,000°C. The photosphere appears darker near the edge (limb...slightly cooler layer of gases above the photosphere, known as the reversing layer, which...
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