Obama notes that he's busy working on the speech… Watch a massive asteroid pass by Earth, beginning at 9 p.m. EST An asteroid the size of three football fields is expected to zip by Earth at a ...

A so-called "city killer" asteroid scientists have been monitoring after discovering it had a small chance of hitting Earth in 2032 "no longer poses a significant threat," NASA said in its latest ...

JACKSONVILLE, Fla. – Breathe easy, Earthlings! That big scary asteroid that had some people worried? Turns out, it will just pass by with no plans to crash our planet’s party. NASA has given ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. NASA estimates that ...

As scientists predict an asteroid has a very small chance of striking Earth in 2032, China is forming a planetary defense force that could defend against asteroid strikes. NBC News' Janis Mackey ...

If you've been losing sleep at night over a certain threatening asteroid dominating the news cycle, it's time to catch up on your rest. The odds that asteroid 2024 YR4 will crash into Earth in ...

One fateful day 66 million years ago, the dinosaurs — which had inhabited Earth for about 165 million years — got a nasty surprise: A roughly 9-mile-wide (15 kilometers) asteroid crashed into ...

Recently, NASA was tracking a large asteroid flying past Earth known as the so-called "city killer." "This one got a lot of attention because it rose to a threat level that we just have not seen ...