Cosmic Flows Project, Voyage to the Great Attractor

"Cosmic Flows" project is focused on producing observed galaxy
distances for 30,000 galaxies with systematic errors below 2%, almost
ten times the number currently known and a five-fold improvement in
systematics. The resultant velocity field is providing initial
conditions for constrained numerical cosmological simulations
"CLUES". The observed and the simulated universe are then
comparatively studied. This synergy of observations and theory
distinguishes this program, and should lead to fundamental
discoveries. Specifically, the program should give a definitive answer
to an outstanding problem in cosmology since 1996 : the cause of the
motion of 630 km/s of the CMB. On the path to this goal we are
learning new informations on the dynamics of Large Scale Structures :
the large coherent flows of galaxies away from voids and towards the
Great Attractor region.  We derive a most recent value for the Hubble
constant at Ho=75 km/Mpc/s using SNIa. "Cosmic Flows" is bringing
together unique expertise in radioastronomy, optical and space
near-infrared surface photometry, theoretical astrophysics and
numerical simulations. We tackle a frontier question: by learning our
"cosmography", we look for where exactly are the Dark Energy and Dark
Matter that dominate the cosmology?