A revolutionary new radiotelescope is set to rise high in the Chilean Andes, aiming not only to advance astrophysics but also to redefine environmental sustainability in astronomy. Named AtLast (Atacama Large Aperture Submillimeter Telescope), the project is led by Italian astrophysicist Claudia Cicone and backed by a global consortium, including Italy’s National Institute for Astrophysics (INAF).

The telescope will be built in the Atacama Desert—renowned for its crystal-clear skies, extreme altitude (over 5,000 meters), and exceptionally dry air—ideal conditions for submillimeter observations. What makes AtLast truly groundbreaking is its goal of becoming the first energy self-sufficient astronomical facility, powered entirely by renewable sources such as solar energy and hydrogen.

INAF plays a central role in the project, drawing on its experience with the Sardinia Radio Telescope (SRT), one of Europe’s most advanced instruments. A recent €20 million upgrade equipped SRT with new high-frequency receivers, making it a valuable testing ground for AtLast’s future capabilities.

AtLast is designed to observe frequencies between 35 and 950 GHz, reaching wavelengths shorter than those accessible with today’s large single-dish radiotelescopes. This opens up an unprecedented observational window onto the universe. The project also prioritizes social sustainability, with plans to share surplus energy with nearby communities such as San Pedro de Atacama.

The second phase of the initiative officially launched in Cagliari, where more than 140 scientists gathered to shape the future of this next-generation observatory.