The term 'SPANIARD's 'THAT'' can be solved by the crossword solutions ESO and ESA. ESO stands for European Southern Observatory, which is an intergovernmental astronomy organization THAT was founded in 1962 and is based in Germany. ESA stands for European Space Agency, which is an intergovernmental organization THAT was established in 1975 and is headquartered in Paris, France. Both organizations are dedicated to the exploration of space and the advancement of science.