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

NASA estimates that roughly 25,000 near-Earth asteroids measuring at least 140 meters across orbit in our planetary neighborhood, but surveys have so far cataloged only about 40% of them. That gap ...

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.

NASA’s asteroid trackers tighten CR2’s orbit with fresh data, and open catalogs show how fast checks keep flybys calm for all now.

New maps issued by NASA detail exactly when and where skywatchers across the contiguous U.S. can see the upcoming total lunar eclipse on March 3, 2026.

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

Two new satellite missions will help NASA scientists better understand Earth and improve the ability to foresee environmental ...

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 ...

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?