NASA's asteroid-hunting spacecraft a discovery machine

NASA's Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) mission has released its third year of survey data, with the spacecraft discovering 97 previously unknown celestial objects in the last year. Of those, ...

Close call: When asteroids whisk past Earth

A peanut-shaped asteroid 1.3 kilometres (3,280 feet) across streaked past Earth on Wednesday, giving astronomers a rare chance to check out a big space rock up close.

Experiments may help assess risks posed by falling space rocks

Four years ago, a brilliant fireball streaked across the dawn sky over Russia, then fractured with the force of about 500,000 tons of TNT. The shock wave blew out windows and damaged thousands of buildings across several ...

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