In the end, the idea looked surprisingly plausible to Muller and his colleagues, and the results of their work were ultimately published in the journal Nature in 1984. Muller then wrote a book about Nemesis, and he has pursued the companion star, while also doing other research, ever since. Tossing comets at us Nemesis, as Muller sees it, is a common red dwarf star that would be visible through binoculars or a small telescope, if only we knew which of some 3,000 stars to look at. These are stars that have been cataloged, but their distances are not known. Any one of them could be the Death Star, as Nemesis has come to be called by some.
Red dwarfs are the most common stars in the galaxy.
They are small and relatively cool, dimmer than our Sun. Binary stars settle into a gravitational dance around a common point in space. The smaller of the two stars does most of the orbiting, whereas the larger one is much closer to the center of the dance routine. It's like two kids on a seesaw. For the thing to work properly, the heavier child must sit closer to the center of the apparatus.