The comet will zoom past Earth, coming within about 7.4 million miles of our planet, according to NASA. http://cbsn.ws/2kujVGB | CBS News

Exploring the Oort Cloud - The Oort Cloud is a vast, distant reservoir of icy bodies, theorized to be a giant spherical shell surrounding our solar system. Located far beyond the orbit of Neptune, it stretches out thousands of times farther than the Sun's influence. This frigid cloud is considered the source of most long-period comets, those that take hundreds or even thousands of years to loop around the Sun. Its existence is based on the observed numbers of these long-period comets, and scient