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Atacama Cosmology Telescope

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Atacama Cosmology Telescope

Atacama Cosmology Telescope, Radio telescope at Llano de Chajnantor Observatory, Chile.

Description

The Atacama Cosmology Telescope is a radio telescope with a 6-meter diameter mirror operating at 5,190 meters elevation in the Atacama Desert in northern Chile. The instrument receives microwave radiation from the early universe and relies on the extremely dry air of this mountain region for its observations.

History

The telescope began operations in October 2007 and worked continuously until 2022 mapping radiation from the early universe. During this period, its observations contributed significantly to our understanding of cosmic history.

Culture

The observatory attracts researchers from around the world who collaborate here to investigate questions about the origin and evolution of the universe. The international makeup of the teams reflects how this kind of research matters globally.

Practical

The telescope sits on a high mountain plateau with very dry air, which is necessary for precise measurements of microwave radiation. Visitors should know that the location is at high elevation and requires careful planning to reach.

Did you know?

The telescope discovered structures in the cosmic background radiation that other instruments had missed, providing new insights into how matter is distributed throughout the universe. These observations revealed how galaxies appear distorted by cosmic curvature and allowed a better understanding of invisible matter.

Location
Inception
2007
Diameter
6 m
Part of
Llano de Chajnantor Observatory
GPS coordinates
-22.95861,-67.78750
Latest update
December 12, 2025 15:11

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