... Espaц±ol (Chile) . ... ESO, the European Southern Observatory . ... Survey Telescopes . ... SwedishБЂ“ESO Submillimetre Telescope . ... The most accurate study so far of the motions of stars in the Milky Way has found no evidence for dark matter in a large volume around the Sun. According to widely accepted theories, the solar neighbourhood was expected to be filled with dark matter, a mysterious invisible substance that can only be detected indirectly by the gravitational force it exerts. ...