Scientists are raising serious alarms about hidden threats from space that could strike Earth without warning. NASA officials ...

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

An asteroid the size of a building could collide with the Moon in 2032 and generate a flash visible from Earth.

A NASA scientist has warned that thousands of city-killing asteroids could strike Earth, and there’s currently no defense ...

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 ...

Asteroid mining companies are finally getting off the ground, and that is raising some concerns about the impact those activities will have on the space environment. A new paper published in Acta ...

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

A new study analyzes three asteroid and two meteorite samples to see if space rocks smacking into Earth could’ve helped ...

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

Astronomers do not know where thousands of “city-killer” asteroids are, Nasa’s head of planetary defence has admitted.

Space around the Sun contains far more than planets. Scattered through it are smaller bodies made of rock, metal, ice and ...

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