Another sizable asteroid has made a close pass to Earth on May 15, making 2010 WC9 the 35th object to pass within one lunar distance in 2018 alone, and the 17th to have passed within one-half of the distance between the Earth and the Moon. Thankfully, this object wasn’t big enough–or traveling fast enough for that matter–to cause any major damage to the Earth if it had actually hit us. But what is up with the increased number of asteroids making close passes to our little blue home?