A massive asteroid is heading our way, and it’ll make its closest pass by our planet in centuries on May 27. Called 1989 JA (or sometimes just asteroid 7335), it’s 1.2 miles (1.8 kilometers) in diameter, which helps earn it the classification of a “potentially hazardous” object according to astronomers, even though it poses no real risk to our planet. At that size, it’s about twice the size of Dubai’s