Last modified on 04 March 2002.
What a wonderful world
Photos and travel accounts from around the world
Photo Calendar 2002 - 3rd of February 2002
Copyright: R. Rekola
The liquid nitrogen container. Liquid nitrogen is used to cool
CCD-cameras down to -100°C or colder. This is done to
avoid noise in the images. Cooling has to be done usually once
or twice a day - depending on the instrument.
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Created by: Rami T. F. Rekola