The object is hurtling towards the Earth at a zippy 12,616 miles per hour, according to data from the space agency.

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

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

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

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

The discovery is just the latest to come from the asteroid sample, which dates back to the dawn of the solar system.

She’s worried about the a-rock-alypse. A planetary defense expert is warning that humanity is defenseless against up to 15,000 undetected near-Earth asteroids that have the potential to take out a ...

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

NASA has raised red flags over growing asteroid threats that could potentially damage the Earth.To one’s surprise, astronomers are unaware of the location of thousands ...

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