For a few days at the end of December, an asteroid named 2004 MN4 looked like it might be Earth’s biggest impact threat. Based on available information about its orbit, astronomers gave odds of 1 in ...

Update, Dec. 25, 9:47 p.m. ET: The risk of an impact by asteroid 2004 MN4 went up slightly on Saturday, Dec. 25. It is now pegged at having a 1-in -45 chance of striking the planet on April 13, 2029.

An asteroid expected to fly past Earth in 2029 will be visible to the naked eye, scientists projected Thursday. It's a once-in-a-millennium event. And you may want to buy plane tickets now, as the ...

An asteroid expected to fly past Earth in 2029 will be visible to the naked eye, scientists projected Thursday. Subscribe to read this story ad-free Get unlimited access to ad-free articles and ...

Asteroid 2004 MN4 is back in the news again. Rusty Schweickart, lunar module pilot of Apollo 9, last week called on Congress to send a spacecraft to the asteroid and tag it with a transponder. Data ...

A giant asteroid the size of three football pitches will make the closest flyby of Earth in recorded history for an object of its size, scientists said yesterday. A giant asteroid the size of three ...