NSF to Decommission Arecibo Observatory’s 305-meter Telescope Due to Safety Concerns

The main collecting dish is among the world’s largest single-dish radio telescopes. The reflective dish is 1,000 feet in diameter, 167 feet deep, and covers an area of about 20 acres. (Credit: UCF)

ALEXANDRIA, Va. (NSF PR) — Following a review of engineering assessments that found damage to the Arecibo Observatory cannot be stabilized without risk to construction workers and staff at the facility, the U.S. National Science Foundation will begin plans to decommission the 305-meter telescope, which for 57 years has served as a world-class resource for radio astronomy, planetary, solar system and geospace research.