The Infrared Space Observatory (ISO) was the world's 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, 1999, Far-Ir Evolution Of Galaxies: The Iras Deep Survey Sample. Part 3, 1.0, European Space Agency, https://doi.org/10.5270/esa-e2ra33e