Beneath a breathtaking full Moon, construction on the world’s largest optical and infrared telescope—the ELT—progresses in the Atacama Desert.
Giant cranes sculpt its impressive structure while shimmering insulating panels shield it from the desert’s extremes. Captured at just the right moment by ESO’s Juan Beltrán, the image reveals not just the telescope’s grandeur, but a rare cosmic alignment that photographers raced to immortalize.
A Striking View: Full Moon Frames the ELT
The full Moon takes center stage in this stunning image, perfectly framing ESO’s Extremely Large Telescope (ELT) under construction. Captured at the exact moment when the rising Moon appears to rest atop Cerro Armazones, the image reveals a striking halo effect around the evolving telescope site.
Building the World’s Largest Telescope
On either side of the ELT’s growing structure, massive cranes are hard at work assembling what will become the world’s largest optical and infrared telescope. The construction team, led by the company Cimolai, has begun covering the telescope’s dome with shiny, insulating cladding. This protective layer, seen here glowing in the sunset, will shield the ELT from the intense sunlight and harsh conditions of the Atacama Desert.
Through an opening in the dome, you can glimpse the telescope’s main framework, which will eventually support its five massive mirrors. One of the two large sliding doors designed to cover this opening is currently being installed.
Capturing a Perfect Celestial Moment
The photo was taken on March 13 by Juan Beltrán, a member of ESO’s Paranal Observatory team, located not far from the ELT site. As seen in the image above, other photographers also seized the rare opportunity to capture this perfect alignment. As the ELT continues to rise, it offers stunning moments like this, showcasing not just human ingenuity but the breathtaking beauty of the cosmos.
The Extremely Large Telescope (ELT), being built by the European Southern Observatory in Chile’s Atacama Desert, will be the largest optical and infrared telescope ever constructed. Its 39-meter segmented mirror will collect more light than any existing telescope, allowing astronomers to explore the earliest galaxies, study exoplanets for signs of life, and unlock cosmic mysteries like dark matter and dark energy. Equipped with state-of-the-art adaptive optics, the ELT will deliver images up to 15 times sharper than Hubble’s, offering an unprecedented view of the universe and redefining humanity’s ability to explore the stars.
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