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, SMITH et al., 1999, 'THE MID-IR SPECTRAL ENERGY DISTRIBUTION OF IR LUMINOUS GALAXIES PART 2', 1.0, European Space Agency, https://doi.org/10.5270/esa-6ngi7u3