Extremely Large Telescope Progresses Towards 2028 First Light

The Extremely Large Telescope in Chile's Atacama Desert is set to revolutionize our understanding of exoplanets and the universe, with first light expected in 2028.

In the sprawling expanse of Chile’s Atacama Desert, the construction of the Extremely Large Telescope (ELT) is rapidly progressing atop Cerro Armazones.

Recent visuals released by the European Southern Observatory (ESO) showcase remarkable advancements in the assembly of the telescope’s dome, its central framework, and the foundational work for the monumental M1 mirror, one of five crucial mirrors integral to its astronomical pursuits.

Transformative Potential

Once finished, the ELT will claim the title of the largest optical and infrared telescope on the planet, with its sights set on capturing its first light by 2028.

This groundbreaking instrument aims to delve into the mysteries of Earth-like exoplanets and their atmospheric conditions while also enhancing our understanding of the universe’s expansion.

Engineering Marvels

The M1 mirror itself is a marvel of engineering, boasting a staggering diameter of 128 feet (39 meters) and an impressive weight of approximately 200 tons.

Its innovative lattice design is specifically crafted to facilitate precise movements during observations, allowing it to respond adeptly to the ever-changing forces of gravity, wind, vibrations, and temperature.

Public Engagement

In an effort to connect with the public and share the exhilarating journey of this monumental project, the ESO is offering an array of insights through live webcams, captivating drone footage, and a stunning collection of photographs from the construction site.

For those eager to witness the transformation over time, a time-lapse video documenting the telescope’s evolution is also available for viewing.

Looking ahead, the timeline for the ELT’s development unfolds like a grand cosmic plan, with the secondary mirror (M2) slated for completion in 2025 and the tertiary mirror (M3) following closely behind in 2027.

Meanwhile, the final touches on the dome and structural components are anticipated to be wrapped up by 2026.

As each milestone is reached, the ELT not only heralds a new era in astronomical observation but also ignites the imagination of people everywhere, drawing them into the wondrous exploration of the cosmos.

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