article_snippet.sent: Published online in the peer-review journal, Monthly Notices of the Royal Astronomical Society — one of the world's leading primary research journals for astronomy and astrophysics, knowing the location and motion of matter in the universe will help astrophysicists predict the universe's expansion and identify where, and how much dark matter exists.
article_snippet.sent: Dark matter accounts for a large majority of the mass content in the universe.
article_snippet.sent: The existence and properties of dark matter can only be inferred indirectly through it gravitational effects on visible matter and light. '
article_snippet.sent: A better understanding of dark matter is central to understanding the formation of galaxies and the structures galaxies live in such as galaxy clusters, superclusters and voids,' said Hudson.
article_snippet.sent: These deviations in the motion of galaxies are a valuable tool to determine the distribution of matter and dark matter on the largest scales.
article_snippet.sent: a 3D Map of the nearby Universe shows the density field smoothed with a Gaussian window of 4 Mpc/h.
highlights_snippet.sent: Will help astrophysicists predict the universe's expansion .
  could help identify where, and how much dark matter exists .