(Wikimedia Commons, NASA, Hubble Telescope)
Often considered the loneliest star in the universe, Fomalhaut is anything but lonely! It acquired the title of being lonely from how brightly it shines (and how much it stands out) compared to the surrounding stellar objects, all while looking at it from Earth. And it's also "by itself" for a considerable stretch of the night sky. But despite this, it is the brightest object within the constellation Piscis Austrinus. Fomalhaut has a disc of debris surrounding it, and what appeared to be a small planet or star orbiting it. It was eventually discovered that it was nothing more than a bit of debris that got stuck together.