"The researchers estimated from their observations that there are nearly two rogue planets for every star in the Milky Way. Other estimations suggest a much larger number, up to 100,000 times more rogue planets than stars in the Milky Way. In November 2012 astronomers discovered a rogue planet around 100 light-years from Earth." Rogue planet - Wikipedia, the free encyclopedia
Small Moon: "GENERAL JAN DODONNA: An analysis of the plans provided by Princess Leia has reinvigorated the arguments of the 'artificial moonlet' and 'rogue planet-station' camps. I fear this question is fracturing the Rebellion.
Artist's concept showing a free-floating planet with roughly the mass of Jupiter. These lone worlds, perhaps ejected from the planetary systems of their birth, are probably more common in our galaxy than stars. CREDIT: NASA/JPL-Caltech/R.
Recent disvoveries suggest that the Milky Way hosts nomad planets adrift in space that may play a dynamic role in the universe. Titled "Nomads of the Galaxy," a recent study proposed an upper limit to the number of nomad planets.