The universe is really big. We live in a galaxy, the Milky Way Galaxy. There are about a hundred billion stars in the Milky Way Galaxy. And if you take a camera and you point it at a random part of the sky, and you just keep the shutter open, as long as your camera is attached to the Hubble Space Telescope, it will see something like this. Every one of these little blobs is a galaxy roughly the size of our Milky Way. Which tells you something about our place in the universe.
According to quantum mechanics space is filled with pairs of virtual particles and antiparticles that are constantly materializing in pairs, separating, and then coming together again, and annihilating each other.
