The Oort Cloud is a vast, theoretical spherical shell of icy Comets encircling our Solar System at its outermost edge. It is thought to be the origin of long-period comets, a cold, distant reservoir of ancient planetary building blocks.
The Oort Cloud is a vast, theoretical spherical shell of icy Comets encircling our Solar System at its outermost edge. It is thought to be the origin of long-period comets, a cold, distant reservoir of ancient planetary building blocks.