07/08/2025
At the summit of Cerro Pachón, one of Earth’s most powerful telescopes is now capturing some of the oldest light in the universe.
https://theatln.tc/GC2PAv7m
“This ridge, on the edge of the Atacama Desert in Chile, some 9,000 feet above sea level, is now home to three of the world’s most powerful telescopes,” including the Vera C. Rubin Observatory, writes Michael Jones McKean, the observatory’s artist in residence. “It’s also probably one of the most unforgiving locations in the world to try to build anything, let alone something as complex as an observatory. Yet these same conditions—distance from anthropogenic light sources, a mountainous altitude above the cloud line, a crisp desert atmosphere—provide the baselines for Rubin to access the faintest of faint celestial objects.”
“Rubin is what’s called a ‘survey telescope,’ making its principal artifact a map,” McKean continues. “In this case, the most elaborate, 4-D, data-dense, Borgesian map of the cosmos in motion that humans at this moment conceivably can make. It will catalog 37 billion discrete astronomical objects, revisiting them every three nights again and again, for 10 years.”
The first mind-bending images taken by the observatory were released this week in the tradition of “first light,” a new observatory’s ceremonial opening. “The images represent a decades-long effort by a globally dispersed team of astrophysicists, data scientists, engineers, administrators, machinists, welders, bus drivers, cooks, and thousands of others completing one of the most sophisticated objects that humans have ever built,” McKean writes.
📸: NSF-DOE Vera C. Rubin Observatory