asteroids

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Arizona professor will lead NASA project to locate menacing objects near Earth

NASA has appointed a University of Arizona professor to lead a project to track asteroids that potentially could crash into Earth. The mission involves launching a telescope into a high orbit to locate such near-Earth objects using the infrared radiation they emit. Amy Mainzer, a professor of planetary sciences, will lead a team building the

Science

Huge Puerto Rico radio telescope, already damaged, collapses

A huge, already damaged radio telescope in Puerto Rico that has played a key role in astronomical discoveries for more than half a century completely collapsed on Tuesday. The telescope’s 900-ton receiver platform and the Gregorian dome — a structure as tall as a four-story building that houses secondary reflectors — fell onto the northern

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