Is there any reason to assume there aren't billions of rogue planets all around us that we can't detect? From what we have observed the are objects of all sizes out there. There are the supergiant stars, and everything smaller. From what we have observed, the most common type of star is a red dwarf. It would make sense, that the smaller the object, the more common it would be in the universe. We have trouble detecting even small stars with our current technology. I would then assume that there are many trillions of objects out there that are just too small to detect. Is there any reason there couldn't be billions of jupiter sized planets or planets of any size for that matter out in space that we can't detect that essentially are the center of their own solar system? I'm not well versed in this area, so I have no idea, if there's a reason that this isn't likely what is that reason?