atmospheric window

atmospheric window

noun Astronomy.
any of the wavelengths at which electromagnetic radiation from space can penetrate the earth's atmosphere.

Origin:
1965–70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Atmospheric window is always a great word to know.
So is red giant. Does it mean:
a star in an intermediate stage of evolution, characterized by a large volume, low surface temperature, and reddish hue
used to designate the brightest star in a constellation
Collins
World English Dictionary
atmospheric window
 
n
wavelengths of the electromagnetic spectrum that can be transmitted through the earth's atmosphere. Atmospheric windows occur in the visible, infrared, and radio regions of the spectrum

Collins English Dictionary - Complete & Unabridged 10th Edition
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