Last night, the 5,000 fibre-optic ‘eyes’ of the Dark Energy Spectroscopic Instrument (DESI) reached a major milestone, having fully covered the area originally planned for its map of the universe. Thus, DESI’s five-year programme has concluded ahead of schedule and with far more data than expected, resulting in the largest high-resolution 3D map of the universe ever produced. This map will enable researchers to explore dark energy, which accounts for 70% of the universe and drives its accelerated expansion. By comparing how galaxies were distributed in the past with their current

An international team of astronomers has captured the most detailed and completed view yet of the mysterious filaments surrounding the giant galaxy M87. Using new observations from the Gran Telescopio Canarias and the Canada-France-Hawaii Telescope, the study reveals how these long, thread-like structures move, evolve, and interact with their galactic environment and the activity of the central supermassive black hole. These findings have just been published in Monthly Notices of the Royal Astronomical Society. M87: a giant galaxy and its mysterious threads M87, located about 55 million

Astronomers at the Instituto de Astrofísica de Canarias (IAC), using the 2-meter robotic Two-meter Twin Telescope (TTT) at the Teide Observatory, have obtained the deepest optical images ever taken of Malin 2, one of the largest and faintest spiral galaxies in the Universe. These ultra-deep observations have revealed previously unseen structures, including several diffuse stellar emissions and a striking, elongated spiral-like feature, hinting at past interactions with other galaxies. The team has also identified a potential ultra-diffuse dwarf galaxy (UDG) about 400,000 light-years from