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, manager for ...

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

"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 ...

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

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 ...

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

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

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

For a brief moment, it looked like asteroid 2024 YR4 had a real shot at hitting Earth in 2032. With its impact probability climbing to a record-breaking 3%, astronomers scrambled to refine its ...

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 ...