Editing Ozone layer (section)

==Implications for astronomy==
As ozone in the atmosphere prevents most energetic ultraviolet radiation reaching the surface of the Earth, astronomical data in these wavelengths have to be gathered from satellites orbiting above the atmosphere and ozone layer. Most of the light from young hot stars is in the ultraviolet and so study of these wavelengths is important for studying the origins of galaxies. The Galaxy Evolution Explorer, [[GALEX]], is an orbiting ultraviolet space telescope launched on April 28, 2003, which operated until early 2012.<ref>{{cite web |title=ozone layer |date=May 9, 2011 |language=en |website=National Geographic Society |url=http://www.nationalgeographic.org/encyclopedia/ozone-layer/ |access-date=September 16, 2021}}</ref>

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File:Ultraviolet image of the Cygnus Loop Nebula crop.jpg|This [[GALEX]] image of the [[Cygnus Loop|Cygnus Loop nebula]] could not have been taken from the surface of the Earth because the ozone layer blocks the ultra-violet radiation emitted by the nebula.
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