Massive 'City Killer' Asteroid to Safely Pass Between Earth and Moon This Weekend.

An asteroid known as "city killer" will pass harmlessly between the orbits of Earth and the moon this weekend. Measuring between 40 and 100 meters in size, the asteroid will fly by at a distance of 105,633 miles from Earth. Experts will use radar to get more precise measurements for the object. Although the phrase "city killer" gets bandied around by experts, this asteroid will not cause any harm. There are currently more than 1,450 near-Earth objects on the "risk list," and they are added whenever there is "the slightest possibility that it might impact [Earth] over the next 100 years."