The Oort Cloud is a huge sphere of rocks and dust surrounding the Solar System. It’s hard to explain just how big and far away the Oort Cloud is. If the Solar System is a penny with a diameter of 2 cm, with Neptune a little pinprick circling around the edge of the penny and Earth’s entire orbit so small it just looks like a tiny dot in the center, the asteroid belt is a sharpened—pencil-drawn thin circle in the center of the penny with a diameter of about 2 mm.
The Kuiper Belt is a flat circle around the outside of the penny like Saturn’s rings, drawn as thick as it would be if you painted it with your fingertip — seems small, but it would take 350 years for an airplone to pass through it. The Oort Cloud isn’t a disk but a sphere, starting about 30 cm or 1 ft away from the penny in all directions, but continuing outward for 30 m or 100 ft in all directions. About the size of Disney World’s Spaceship Earth.
Keishinrei 