SOFIA Astronomy and Technology in the 21st Century

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SOFIA, the Stratospheric Observatory For Infrared Astronomy mounted on-board a Boeing 747SP will open a new era in MIR/FIR astronomy. Starting in 2002, SOFIA will offer German and American astronomers a unique platform, providing regular access to the entire MIR and FIR wavelength range between 5 micron and 300 micron part of which is otherwise inaccessible from the ground. SOFIAs 2.7m mirror and optimized telescope system combines the highest available spatial resolution with excellent sensitivity. SOFIA will operate in both celestial hemispheres for the next two decades. In this paper we present an overview of the SOFIA project and the science that this observatory will be able to address.