A NASA-funded plan to build a large radio telescope on the moon's far side is nearing final approval and could become a reality by the 2030s, researchers say. The ambitious project will help safeguard ...

The Arecibo radio telescope stood for 57 years, working on the cutting edge of astronomical research. For most of its lifetime, it was the largest single radio telescope dish in the world, only ...

It happened in less than 10 seconds, two years ago today: The Arecibo Observatory’s 1,000-foot radio dish collapsed, eliminating one of the world’s most renowned sources of radio observations.

The Arecibo telescope—located in Arecibo, Puerto Rico—was the world’s largest single-dish telescope for most of its more than half-century of existence.

Arecibo was the world's largest single-dish radio telescope until it was surpassed in 2016 by China's Five-hundred-meter Aperture Spherical Telescope (FAST).

In the mid-1990s, Arecibo underwent its second major upgrade, which included adding a Gregorian reflector to correct the dish’s spherical aberration and replacing its line feed antennas with a ...

Arecibo Observatory's massive radio dish was many things to many people: pulsar finder, broadcaster to aliens, asteroid mapper, Bond villain's hidden satellite dish, Puerto Rican icon, birthplace ...

Arecibo’s inexorable decline began a decade later. In 2005, the NSF decided to review its portfolio of observatories and astronomy research grants, which together at the time cost the agency ...

Arecibo's dish, at 1,000 feet in diameter, is over twice the size of Goldstone's at 229 feet across. Large areas of the Arecibo dish were smashed when the structure above collapsed Dec. 1.

Arecibo was 20 times more sensitive and could detect objects as twice the distance of Goldstone’s radar, while Goldstone could see more of the sky. “Right now, we basically can’t replace it ...

The Arecibo Telescope was constructed with a spherical dish, as opposed to the parabolic shape employed by most radio (and many optical) telescopes. This was because the dish itself was too large ...

The Green Bank telescope in West Virginia is planning to add radar to its dish, but the beam will be weaker and narrower than Arecibo’s. For the foreseeable future, Earth will be flying blind.