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 ...

The potential risk of Asteroid 2024 YR4 impacting Earth in 2032 dropped to nearly zero following new observations that helped better predict the asteroid's trajectory.

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

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

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 ...

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

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

Update: The odds of asteroid 2024 YR4 striking Earth in 2032 have fallen to 1.5%, NASA announced Wednesday. Read the latest. The risk that an increasingly ominous asteroid dubbed 2024 YR4 will ...

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

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

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 ...