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A major fraction of the energy emitted within the universe is in the infrared, but we cannot detect it except using instruments specially developed to do this. The IAC has been aware of this since its beginning, and has been developing infrared instruments for ground based and space telescopes for over four decades, with the aim of going beyond previous frontiers of knowledge.

The fourth issue of Paralajes magazine takes an intensive journey through the many research studies carried out in the IAC using this type of radiation, and the technology developed here for observatories throughout the world, and even for space missions such as SOHO or the James Webb Space Telescope. There is a special section devoted to the astrophysicist Carlos Sanchez Magro, a pioneer in research and instrumentation in the infrared, who could not see the legacy of his work because he died prematurely, and who is remembered because his name was given to one of the first of the iAC's telescopes at the Teide Observatory.

Most of the energy emitted by the Universe is infrared and, therefore, we cannot see it without special instruments. The IAC has been aware of this since its beginnings, which is why it has spent more than four decades developing instrumentation for ground-based and space-based telescopes in order to push back the frontier of the unknown. The fourth issue of the journal Paralajes takes an intense tour through the numerous research projects carried out at the IAC thanks to this type of radiation and brings the technology developed at this centre to observatories all over the world, and even to space missions such as SOHO or the JWST. He also makes special mention of the astrophysicist Carlos Sánchez Magro, a pioneer in infrared research and instrumentation, who was unable to see the legacy of his work due to his untimely death and who gave his name to one of the IAC's first telescopes at the Teide Observatory.