http://www.iflscience.com/space/this-3d-map-of-12-million-galaxies-could-unlock-the-secrets-of-dark-energy/

Astronomers have announced the most precise results on the expansion of the universe and dark energy yet. This feat was possible by using Sloan Digital Sky Survey, an automated system, which has collected data on 1.2 million galaxies.

Hundreds of scientists from all over the world collaborated to create the largest-ever three-dimensional map of the cosmos, looking at galaxies between 2 and 7 billion light-years away.

"We have spent a decade collecting measurements of 1.2 million galaxies over one-quarter of the sky to map out the structure of the universe over a volume of 650 cubic billion light-years," said Jeremy Tinker of New York University, a co-leader of the scientific team that led this effort, in a statement.

"This map has allowed us to make the best measurements yet of the effects of dark energy in the expansion of the universe. We are making our results and map available to the world."