photosphere
Use Photosphere in a sentence
təˌsfɪər noun
1.
a sphere of light or radiance.
2.
Astronomy. the luminous visible surface of the sun, being a shallow layer of strongly ionized gases.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source
|
Link To photosphere
Collins
World English Dictionary
photosphere (ˈfəʊtəʊˌsfɪə) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n | |
| the visible surface of the sun, several hundred kilometres thick | |
| photospheric | |
| —adj | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
00:10
Photosphere
is always a great word to know.
So is altitude. Does it mean:
| the angular distance of a heavenly body above the horizon |
| one of several hundred known celestial objects, generally believed to be rapidly rotating neutron stars, that emit pulses of radiation such as radio waves with a high degree of regularity |
American Heritage
Science Dictionary
| photosphere (fō'tə-sfîr') Pronunciation Key
The lowest visible layer of a star, lying beneath the chromosphere and the corona. Stars are made entirely of gas and thus have no surface per se, but the gas beneath the photosphere is opaque, so the photosphere acts as their effective visible surface; it is also the boundary from which the Sun's diameter is measured. The Sun's photosphere is a very thin layer made up of numerous granules (transient convective cells) where hot gases rise and give off light and heat. The photosphere of the Sun has a temperature of around 6,000°K and is the region in which sunspot activity is located. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Example sentences
The center does not radiate in space so it is irrelevant, likewise everything below the photosphere.
These particles came from the sun's visible surface, called the photosphere.
The photosphere is the visible surface of the sun and the lowest layer of the atmosphere.
The tops of convective cells can be seen on the photosphere as granules.
Image for photosphere
Nearby Words
Copyright © 2013 Dictionary.com, LLC. All rights reserved.
