The six-mile-wide asteroid punched a one-way ticket toward extinction for all non-avian dinosaurs. Some 66 million years ...

Buried "megaripples" — some the size of five-story buildings — are helping scientists piece together the devastation ...

But scientists revised that assessment after a precise analysis of the asteroid’s orbit in 2021. And scientists are expecting similar forecasting trends with 2024 YR4, which currently sits at a ...

so a larger telescope like Webb can help narrow down the asteroid's true trajectory. The Webb telescope, launched in 2021 as an international partnership of NASA, the ESA and the Canadian Space ...

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 ...

The main belt asteroid Donaldjohanson is now in sight as the Discovery Program mission prepares for a flyby of the object in April.

In the case of Apophis, further observations eventually allowed astronomers in 2021 to rule out the possibility of an impact when the asteroid makes a close flyby to Earth in 2029 and again in 2036.

The $10 billion orbiting observatory will give astronomers a better sense of the near-Earth asteroid 2024 YR4's size and position.