The discovery, made in collaboration between the IAC Solar System Group and Light Bridges, reveals the rotation period of comet 3I/ATLAS The Two-metre Twin Telescope (TTT) has made a pioneering discovery in astronomy: the first detection of a jet of gas and dust and its periodic modulation in an interstellar comet, 3I/ATLAS. The study, published in the journal Astronomy & Astrophysics, provides the first evidence of localised activity from an interstellar nucleus, offering unique insight into the nature of a celestial body that formed outside our Solar System. An extraordinarily normal

From today until 5 December 2025, the Instituto de Astrofísica de Canarias (IAC) is hosting the SO/PHI Science and Team Meetings, an international gathering focused on the scientific and technical advances of the Polarimetric and Helioseismic Imager (PHI) instrument aboard ESA's Solar Orbiter (SO) space mission. The development of PHI was co-led by the Spanish Space Solar Physics Consortium (S3PC), which also currently coordinates its scientific operation and exploitation. The IAC is part of this network. PHI is a high-precision solar observation instrument equipped with two telescopes—one

The International Scientific Committee (CCI) of the Canary Islands Observatories met this week in Bologna, Italy, to address the current status and future actions for the astronomical infrastructures managed by the Instituto de Astrofísica de Canarias (IAC). The CCI is the body established under the International Agreements that founded the Canary Islands Observatories. It ensures the effective participation of user institutions in decision-making regarding the use, maintenance, and improvement of these world-class scientific facilities. Project and Infrastructure Monitoring The meeting was