The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
European Space Agency, SPINOGLIO et al., 1999, 'IR ENERGY DISTRIBUTIONS AND IMAGING OF THE COMPLETE SAMPLE OF TOWARDS THE UNIFICATION OF ACTIVE GALACTIC NUCLEI. PART 2', 1.0, European Space Agency, https://doi.org/10.5270/esa-lac5t3l