A 'Galaxy X' Found Orbiting the Milky Way

A 'Galaxy X' Found Orbiting the Milky Way: "The search for a mystery Galaxy X orbiting the Milky Way may have been solved. Many large galaxies are thought to have dark matter satellite galaxies too dim to be detected. Theoretical astronomer Sukanya Chakrabarti explains how she has found a way to locate 'dark' satellite galaxies by analyzing the ripples in the hydrogen gas distributed in spiral galaxies such as the Milky Way. Chakrabarti predicted the mass of Galaxy X to be one-hundredth that of the Milky Way, in a parabolic orbit around our galaxy, at a distance of about 300,000 light years from the galactic center."