Image:Lapalma-spectrum.png

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[edit] Summary

Typical spectrum of a moonless La-Palma sky taken with the William Herschel telescope on march 1991. Several features of airglow can be seen in this spectrum of the night sky. The U,B,V,R and I are bands of the electromagnetic spectrum, and they stand for Ultraviolet, Blue,Visual,Red,Infrared respectively.

A pseudo-continuum in the B-band from overlapping O₂ bands at 260-380nm, also NO₂ at 500nm-650nm. Apart from the O₂ line at 864.5nm, the features redward of 650nm come from the Meinel rotation-vibration bands of OH.

Several lines are caused by light pollution, most notably the Na line at 589nm and the Hg lines at 435.8nm and 546.1nm.

From 'La Palma night-sky brightness', Isaac Newton Group. Credits: Chris R. Benn

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	Date/Time	Dimensions	User	Comment
current	13:21, 1 May 2006	901×615 (22 KB)	Albester (Talk \| contribs)	(Typical spectrum of a moonless La-Palma sky taken with the William Herschel telescope on march 1991. Several features of airglow can be seen in this spectrum of the night sky. The U,B,V,R and I are bands of the electromagnetic spectrum, and they stand for)