Inside the IceCube Laboratory at the South Pole. There are over 5400 sensors in total looking for light stemming from high-energy particles created from cosmic ray or neutrino interactions. Some of the cables, one for each light sensor, that feed data to a central computer are visible in this picture. The IceCube observatory is remarkably robust, taking data with 99.9% uptime. Occasionally, something does need maintenance or repair. That means a trip of about 800 meters from the station to the IceCube Laboratory to track down the component that needs attention.
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