A potentially hazardous asteroid, at least 20 times the size of the Chelyabinsk meteorite, will approach the Earth on January 26. The rock is expected to fly by at a distance of 1.2 million kilometers. The asteroid, named 2004 BL86 by scientists, is estimated to be between 440-1,000 meters in diameter. 1.2 million kilometers is approximately three times the distance from the Earth to the Moon. According...