Constructing A 3D Map of the Far-Distant Universe

The Subaru Telescope, an 8.2-meter optical-infrared telescope, operates as a branch of the National Astronomical Observatory of Japan (NAOJ). The Subaru Telescope's FastSound project is surveying galaxies in the Universe over nine billion light years away, and this is the project's first version of a 3D map of the Universe. Using the Subaru Telescope's new Fiber Multi-Object Spectrograph (FMOS), the map includes 1,100 galaxies and shows the large-scale structure of the Universe about 4.7 billion years after the Big Bang. The project is ongoing and will eventually include 5,000 galaxies over ten billion light years away. 3D surveys of the nearby Universe have been conducted before, but the FastSound project distinguishes itself by developing a 3D map of the far-distant Universe. The final 3D map of the distant Universe will serve a primary scientific goal of the project - to precisely measure the motion of galaxies and then measure the rate of growth of the large-scale structure as a test of Einstein's general theory of relativity.