While not an official term, "city-killing asteroids" refers to asteroids large enough to significantly damage cities if they ...

China's Tianwen-2 spacecraft captured a selfie with Earth when it was about 26.7 million miles (44M km) from Earth and 28 million mi. (45M km) from asteroid 2016HO3. Credit: Space.com | footage courte ...

If the world exploded, what proportion of the rocks floating in space would have evidence of life? (continued) ...

NASA planetary defense experts warn that up to 15,000 undetected asteroids could devastate a major city on Earth.

NASA experts warned that human beings are vulnerable to thousands of hidden “city-killer” asteroids. A new space telescope may improve detection, but we currently lack tools to stop a threat., US Buzz ...

NASA's head of planetary defence, Dr Kelly Fast, has issued an unsettling update on thousands of ‘city-killer’ asteroids that could hit Earth.

"We would not have any way to go and actively deflect one right now," warns the scientist who led NASA's DART mission.

Imagine a rock the size of a football stadium hurtling through space at thousands of miles per hour, heading straight for a major city, and we have no way to stop it. NASA has just issued a sobering ...

NASA's confirmation that thousands of city-killer asteroids are currently lurking in space. Our modern satellites and telescopes have no way to track and identify these asteroids. Last year’s ...

NASA planetary defense experts report that mid-size near-Earth asteroids could cause regional damage, with detection and deflection remaining limited, according to New York Post and AAAS reports.

James Webb Space Telescope (JWST) will provide insights far more precisely than ground telescopes can manage now, as the rock is too far away for most Earth-based instruments.