A 170-foot asteroid is set to race past Earth today at extraordinary speed, NASA says. Though no impact is expected, scientists are watching closely. What makes this flyby worth attention?

"For asteroids of the size scale relevant to planetary defense (i.e., ∼50-500 m), the mass can only be directly measured ...

Space agencies maintain that global cooperation and sustained investment are vital to planetary defence. While the DART ...

Asteroid 2026 CU1 will sweep past Earth this week at high speed, close enough to attract attention yet deemed safe, raising ...

NASA is tracking a plane-sized asteroid known as 2025 XM as it hurtles toward Earth’s neighborhood at roughly 9,753 miles per hour, a reminder of how busy and carefully watched our cosmic surroundings ...

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

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

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

Tiny life forms tucked into debris from an asteroid hit could catapult to other planets—including Earth—and survive, a new ...