In 1963, the Arecibo Observatory became operational on the island of Puerto Rico. Measuring 305 meters (~1000 ft) in diameter, Arecibo's spherical reflector dish was the largest radio telescope in ...

John Grunsfeld has a model of the Hubble Space Telescope on his bookshelf. It's right next to a model of a NASA space shuttle, which delivered Hubble to space 35 years ago, and it's no secret why ...

China has kicked off of a second phase of construction to enhance the capabilities of what is already the world's largest single-dish radio telescope. The Five-hundred-meter Aperture Spherical ...

China's FAST (Five-hundred-meter Aperture Spherical radio Telescope) is the largest radio telescope in the world, dwarfing the 1,000-foot (305-meter) Arecibo radio telescope in Puerto Rico.

A 500-metre (1,640-ft.) aperture spherical telescope (FAST) is seen at the final stage of construction, among the mountains in Pingtang county, Guizhou province, China, May 7, 2016.

Grunsfeld, a former NASA astronaut who has served as both the agency's chief scientist and science division leader, helped Hubble last as long as it has. He flew on no less than three of NASA's ...