On November 16, 1974, humans sent their first message to the stars in an attempt to contact extraterrestrials. They did this using what was then the largest radio telescope in the world, located at ...

In 1963, the Arecibo Observatory became operational on the island of Puerto Rico. Measuring 305 meters (~1000 ft) in diameter ...

For nearly six decades, the Arecibo Observatory in Puerto Rico stood as a monument to human curiosity, exploration, and technological brilliance. Once the world’s largest radio telescope, Arecibo ...

"Even years after the Arecibo Observatory's collapse, its data continues to unlock critical information that can advance our understanding of the galaxy." When you purchase through links on our site, ...

The Arecibo Observatory has been the world's largest single-aperture telescope for more than 50 years. But decreasing funding for its mission could result in its retirement and destruction in the near ...