More than 1 million "interstellar objects" the size of the Statue of Liberty could be drifting unseen in the outer solar system right now, new simulations suggest.

Deep in space, far beyond our planets and even beyond what we can see with the naked eye, more than a million objects are quietly floating toward us. Some are as big as the Statue of Liberty.

An asteroid bigger than the Statue of Liberty will fly past Earth at 8:20pm GMT on Christmas Day, according to data from NASA 's Center for Near Earth Studies. The asteroid, called 2014 SD224 ...