Astrophysicists on Monday published the largest-ever 3D map of the Universe, the result of an analysis of more than four million galaxies and ultra-bright, energy-packed quasars.
The efforts of hundreds of scientists from around 30 institutions worldwide have yielded a "complete story of the expansion of the universe", said Will Percival of the University of Waterloo in Ontario, Canada.
The infant Universe following the Big Bang is relatively well known through extensive theoretical models and observation of cosmic microwave background -- the electromagnetic radiation of the nascent cosmos. Astrophysicist Jean-Paul Kneib of the Swiss Federal Institute of Technology in Lausanne, who initiated eBOSS in 2012, said the goal was to produce "the most complete 3D map of the Universe throughout the lifetime of the Universe".
For the part of the map relating to the Universe six billion years ago, researchers observed the oldest and reddest galaxies. The researchers said this seems to be due to the presence of dark energy, an invisible element that fits into Albert Einstein's general theory of relativity but whose origin is not yet understood.
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