The first flight mission for planetary defense, NASA's Double Asteroid Redirection Test (DART) seeks to validate a method to ...

A NASA planetary expert has revealed that humankind has no way to protect against a city-killer asteroid if it were to head towards Earth.

NASA's OSIRIS-REx mission is scheduled to return samples of Asteroid Bennu to Earth. Credit: NASA Goddard Space Flight Center ...

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

Earth faces a significant threat from thousands of undetected asteroids capable of destroying cities. NASA's planetary defence chief warns that current systems cannot reliably stop these 'city-killers ...

"We don’t know where they are,” said NASA’s planetary defense officer Kelly Fast at the AAAS conference in Arizona this week.

“What keeps me up at night is the asteroids we don’t know about," said NASA's planetary defense chief.

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 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?

A planetary defense expert working for NASA warned that humanity has no defense against up to 15,000 undetected near-Earth asteroids that could wipe out a city.

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

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