Astronomers map a record-breaking 1.2 million galaxies to study the secrets of dark energy

Astronomers announced this week the sharpest results yet on the properties of dark energy. Hundreds of scientists, among them Marcos Pellejero Ibañez and Jose Alberto Rubiño from the Instituto de Astrofísica de Canarias (IAC), and other Spanish institutions as the Instituto de Ciencias del Cosmos from the University of Barcelona (ICCUB) and the Instituto de Física Teórica (UAM-CSIC) from the Sloan Digital Sky Survey III (SDSS-III), collaborated to make the largest-ever, three-dimensional ma...