A NASA planetary defense officer warns thousands of near-Earth asteroids capable of destroying a city remain undetected.

A NASA scientist has warned that thousands of city-killing asteroids could strike Earth, and there’s currently no defense humanity could use to stop them.

Senior figures at NASA have issued a stark warning regarding the safety of Earth from space-borne threats. Speaking at a ...

In a stark and widely reported warning, NASA’s planetary defence chief has revealed that Earth currently has no reliable way to stop thousands of “cit.

NASA officials warn thousands of undetected “city killer” asteroids may be circling near Earth. With limited deflection tools ready, are we prepared if one suddenly shifts onto a collision course?

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

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

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.

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.

An asteroid discovered in December 2024 and named YR4 has a small chance of hitting Earth in 2032. But scientists keep ...

Kelly Fast, a planetary defense officer at NASA, says there could be 15,000 undetected asteroids that have the potential to take out a city.