Two Observatories
The Auger Observatory will have two sites, one in the southern hemisphere and one in the north. This
allows scientists to view ultra-high energy cosmic rays over the entire sky. The southern site near the
city of Malargüe in Mendoza province, Argentina has been under construction since 2000 and completion
is expected in 2007. The northern site is planned for southeast Colorado, USA, near the city of Lamar.

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