How large can a galaxy grow? This is the question behind a new study led by the Instituto de Astrofísica de Canarias (IAC), in which an international team of astronomers has measured, with unprecedented precision, the size of IC 1101, considered the largest known galaxy in the Universe. The study has been published in Astronomy & Astrophysics. The result confirms that this cosmic giant is even larger than previously thought. The main body of IC 1101 reaches a diameter of around 1.7 million light-years, approximately 10 times the size of the Milky Way. If it were placed between our galaxy and

Researchers from around the world are taking part in the China–Spain Astronomical Collaboration on High-Resolution Spectroscopy 2025, an event organised by the Instituto de Astrofísica de Canarias (IAC) in collaboration with the National Astronomical Observatories of China (NAOC), the Nanjing Institute of Astronomical Optics & Technology (NIAOT), and the Gran Telescopio Canarias (GTC) team. The aim of the conference is to strengthen and consolidate scientific cooperation between China and Spain in the field of high-resolution spectroscopy, one of the key areas for studying stars, galaxies