The age of the Universe and the speed of light combine to limit our vision to a 93-billion-light-year spherical bubble of what may be a far greater place. We hope that one day we can learn what else is out there beyond our bubble. Until then, there should be enough going on in the observable Universe to keep us busy: at least 2 trillion galaxies and a septillion stars.
If the observable Universe were a sphere 1 km across, so it would stretch a bit higher than the tallest skyscrapers, our Milky Way would be a tiny disk 2 mm across. On that scale, our Sun is the size of a proton, orbited by a subatomic rocky planet, where the neutrino—size primate reading this is capable of imagining the sheer wonder of it all.
Keishinrei 