2400-foot asteroid, size of Empire State Building, near Earth today!
Smaller asteroids frequently make close trips to Earth and although their distance of close approach is less, they fly past the planet without causing any harm. Larger asteroids pose a risk due to their sheer size even if they aren't on a collision course with Earth. A slight deviation in the asteroid's path due to interaction with the planet's gravitational field could change its trajectory and send it tumbling towards Earth's surface with catastrophic consequences.NASA has now warned that a gigantic 2400-foot asteroid…