The astronomers told us this was the most likely outcome: a "city killer" asteroid that ... and track potential Earth impactors — issued a notification alerting the astronomical community that it had ...

New observations of a small asteroid discovered in December have led astronomers to conclude that the chances of it striking Earth are almost zero after earlier data had indicated a higher risk of a ...

Once, a very long time ago, a massive asteroid hit the Earth and wiped out the dinosaurs. In addition to functionally ...

YR4, which orbits the sun every four years and periodically crosses Earth's orbit. The nature of its orbit makes it a ...

NASA is tracking a bus-sized asteroid zipping past the Earth at nearly 16,000 miles per hour today. The asteroid, known as "2025 DM7," is estimated to be about 42 feet across and soared past our ...

The astronomers told us this was the most likely outcome: a "city killer" asteroid that once had ... that the probability that 2024 YR4 would hit the Earth would probably go up and then at some ...

Asteroids have struck Earth occasionally over its long history, often with cataclysmic results. For example, an asteroid estimated at 6-9 miles (10-15 km) wide - much larger than 2024 YR4 - hit ...

An asteroid could hit Earth in 7 years. Here's how astronomers ... track 90% of all near-Earth objects 140 meters or larger by 2020. "We're at something like 45% right now. Less than half ...