Scientists already knew this could be a doozy. Astronomers previously estimated if 2024 YR4 hits the moon, it could form a crater about one kilometer wide and release some 100 million metric tons of ...

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

Early last year, asteroid 2024 YR4 caught the public’s attention as its chances of hitting Earth in the near future climbed ...

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

Scientists discussed the threat of asteroids at a recent conference in Phoenix. Here's what they said.

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

This is not a drill. There is a chance - albeit a small one - that an asteroid could hit planet Earth within the next decade.

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 top astronomer responsible for defending the Earth against asteroids has revealed what keeps her up at night — thousands of “city killer” space rocks that remain undetected. Dr Kelly Fast, NASA’s ...

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.

On hearing the words "city killer" and "asteroid" in the same sentence, you'd be forgiven for thinking something bad is about to happen. But not to fear. Although an asteroid with the potential to ...