Reply #1: I can probably help you out: [View All]

[SmileyBoy]

1) Yes, the Oort Cloud is real. It's a ball-shaped cloud of particles ranging from dust to 10 miles wide in size surrounding the solar system. It's almost certain it exists.

2) I'm pretty sure all comets that have been discovered by humans originated from the Oort Cloud. These objects fall into orbit by being bumped into other objects in that cloud, and falling into the orbit of the solar system.

3) We don't know how big the universe is. Stephen Hawking said that there could very well be parallel universes, but they could never be tapped. Other scientists have had different theories. Our universe as it is stretches out over 10 billion light years away, or close to the very instance the Big Bang occurred. Like I said, The Oort Cloud is at the edge of our solar system, which is an insignificant speck in our universe.