The mini moon is actually an asteroid about the size of a school bus at 33 feet (10 meters). When it whizzes by Earth on Sunday, it will be temporarily trapped by our planet's gravity and orbit the globe—but only for about two months.

A small asteroid will join Earth's orbit around the sun for two months beginning Sunday, becoming a 'mini-moon.'

You may have heard by now about Earth getting a second moon starting next week. I am going to be honest with you right out of the gate - this is not going to be as exciting as it sounds. First, let's start with what is happening.