Not much is known about 2024 YR4, but the asteroid is estimated to be 131 to 295 feet (40 to 90 meters) wide, a “size range comparable to that of a large building,” said Dr. Paul Chodas ...

It came from outer space! In the early morning of June 30, 1908, people in the remote Tunguska region of Siberia beheld an ...

"Scientifically there's a huge amount we can learn from asteroids," says Alan Fitzsimmons, an astronomer at Queens University ...

Here are today's general risks from asteroids or comets both tiny and very large. Importantly, even relatively small rocks can still be threatening, as the surprise 56-foot (17-meter) rock that ...

Recently, NASA was tracking a large asteroid flying past Earth known as the so-called "city killer." "This one got a lot of attention because it rose to a threat level that we just have not seen ...

NASA was recently tracking a large asteroid, known as the "city killer," after finding a small chance of it hitting Earth in ...

Astronomers believe thousands of large undiscovered asteroids, that could cause regional damage, may be in space.

ESA’s Hera probe captures stunning images of Mars and its moon Deimos during a historic flyby, offering new insights into the ...

“Serpent Mound is the largest serpent effigy built anywhere on the planet Earth,” O’Grady said. “Serpent Mound is built up on ...

YR4 is between 40 and 90 meters in diameter, about the size of a large apartment block. The asteroid 2024 YR4, discovered in ...

A White House science advisor recently war-gamed with space agency heads worldwide to devise a planet-saving defense to an ...

New simulations reveal that the climate, atmospheric chemistry and even global photosynthesis would be dramatically disrupted by an asteroid collision ...