The German-built 100-inch telescope that is the heart of NASA's Stratospheric Observatory for Infrared Astronomy is nestled in the SOFIA 747's rear fuselage.
SOFIAStratospheric Observatory for Infrared AstronomyGerman-built 100-inch 2 5 meter diameter infrared telescope20 tonshighly-modified Boeing 747SP aircraftDLR Deutsches Zentrum fuer Luft- und Raumfahrt German AerospaceL-3 Communications Integrated SystemsUniversities Space Research AssociationUSRADeutsches SOFIA InstitutDSI