Current progress toward construction and the first telescopes on site

Project Status


The project to build CTA is well-advanced: working prototypes exist for all proposed telescope designs and preparations for construction are underway on both sites. An inter-governmental agreement for construction and subsequent operation of the observatory, a European Research Infrastructure Consortium (ERIC), is in preparation and construction is expected to begin in 2022.


The below timeline illustrates the estimated timing for major project milestones through the beginning of 2020 (an updated timeline is in draft for 2021).

CTA Timeline


CTA has come a long way since its conception in 2005. This timeline illustrates CTA’s progress and the estimated timeline for major milestones yet to be completed in order for operations to begin in ~2022 and array construction to end in ~2025 (an updated timeline is in draft for 2021).