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Scientists bury time capsule to celebrate upcoming Extremely Large Telescope (photos)

October 22, 2023
in Science
Scientists bury time capsule to celebrate upcoming Extremely Large Telescope (photos)
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A commemorative time capsule was buried at the construction site of what will soon be the world’s  largest visible and infrared light telescope. 

On Oct. 13, the European Southern Observatory (ESO) celebrated its upcoming Extremely Large Telescope (ETL) by burying a time capsule that was sealed in 2017, when construction first began. The capsule is filled with tokens celebrating ESO staff and the cooperation between the observatory and Chile. It also celebrates the amazing science and technology behind the 39.3-meter telescope. 

“Serving as a symbolic message to future generations, it contains mementos from Chilean authorities, including a plaque from the then President of Chile, Michelle Bachelet Jeria, about opening the skies of the country to the questions of an entire planet, as well as drawings from Chilean children featuring the Universe, ESO telescopes and northern Chile landscapes,” ESO officials said in a statement. 

Related: Amazing space views by ESO’s Very Large Telescope (photos) 

Two people in high-visibility jackets and hard hats are standing on either side of a shiny, metallic square box – the time capsule – placing it into a grey concrete wall.

ESO Council President Linda Tacconi (left) and Vice-President Mirjam Lieshout-Vijverberg (right) buried the time capsule in the concrete of the ELT dome on Oct. 13.   (Image credit: ESO)

Photographs of ESO staff and a copy of a book describing the future scientific goals of the ELT, which is expected to see its “first light” by 2028, were also preserved. The time capsule was buried in the wall of the ELT dome on Cerro Armazones in the Chilean Atacama Desert, where the ESO currently operates its Very Large Telescope (VLT). 

The time capsule was covered in an engraved hexagon that is a one-fifth-scale model of one of the ELT’s primary mirror segments. The Oct. 13 event was led by ESO Council President Linda Tacconi (Germany) and Vice-President Mirjam Lieshout-Vijverberg (The Netherlands). A few days later, on Oct. 15, ESO Council members mounted a commemorative plaque next to where the time capsule was buried. 

Two people wearing high-visibility jackets and hard hats are standing, holding a silver hexagonal plaque from either side. Behind them, three more people, also wearing construction equipment, look on.

A group of ESO Council members installed a commemorative plaque on the wall where the ELT time capsule is buried on Oct. 15.   (Image credit: ESO)

In July, the ELT reached the halfway point in its construction, with an expected completion date of 2028. While the telescope appears as only a steel structure right now, it will eventually house five separate mirrors, the largest of which will be made up of 798 individual hexagonal segments.  

At the centre of this image is the criss-cross steel skeleton structure of the ELT dome, sat on top of a circular concrete base. Tall, spindly cranes are dotted around the circumference of the dome, leaning in all different directions. Past the dome, the brown expanse of the Atacama Desert unfolds into the distance. The desert is a mixture of flat plains and sharp mountain peaks.

The dome structure started to take shape in this photo taken in late September. When complete, the observatory will stand 80 meters (262 feet) high.  (Image credit: ESO)

At 39.3 meters (120 feet) wide, the ELT will be able to take in more light than current ground-based telescopes and thus provide sharper images of the cosmos, which could aid in the search for life outside Earth and reveal new insight on the nature of dark matter and dark energy. 

“As the largest optical and infrared telescope in the world, the ELT will shift our understanding of the universe,” ESO officials said in the statement. “Its scientific goals range from the solar system to the edge of the observable universe, including exoplanets, black holes and the first stars and galaxies.” 

Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at: [email protected].

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