YR4 has a 2% chance of hitting Earth in 2032. Astronomers are tracking it to refine estimates of its size and orbit to see how much of a risk the space rock poses.

It measures 130 to 300 feet across, a pebble compared to the asteroid that killed the dinosaurs, which is estimated to have been six to nine miles in length. On the other hand, on Feb. 15, 2013, an ...

Keep your eye on the ball” is a motto for many athletes—and for astronomers trying to find Earth-threatening space rocks ...

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that the rock has a 97.7 percent chance of zooming by without causing any damage. This steady crawl upward is not a reason to panic, experts say. Any prediction of an asteroid’s trajectory at ...

NASA’s OSIRIS-REx mission delivered samples from asteroid Bennu, revealing crucial molecules linked to life, including amino ...

The meteor fragments returned by OSIRIS-REx shed light on the entwined history of water and the chemical ingredients of life ...

NASA's OSIRIS-REx spacecraft mission has delivered a sample of the asteroid Bennu to Earth and it has been found to contain ...

Asteroid samples fetched by NASA hold not only the pristine building blocks for life but also the salty remains of an ancient water world, scientists reported Wednesday. The findings provide the ...

Bennu—a rubble pile just one-third of a mile (one-half of a kilometer) across—was originally part of a much larger asteroid that got clobbered by other space rocks. The latest results suggest ...

Further observations ruled out an impact. The most infamous asteroid impact occurred 66 million years ago, when a six-mile-wide space rock triggered a global winter, wiping out the dinosaurs and ...