eBOSS (IMAGE)

University of Tokyo

eBOSS

Caption

Previously, SDSS has mapped the universe across billions of light-years, focusing on the time from 7 billion years after the Big Bang to the present and the time from 2 billion years to 3 billion years after the Big Bang. SDSS-IV will focus on mapping the distribution of galaxies and quasars 3 billion years to 7 billion years after the Big Bang, a critical time when dark energy is thought to have started to affect the expansion of the Universe.

Credit

SDSS collaboration and Dana Berry / SkyWorks Digital, Inc. WMAP cosmic microwave background image credit: NASA/WMAP Science Team

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