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Solving the Dark Energy Mystery: A New Assignment for a 45-Year-Old Telescope

Today, the dome closes on the previous science chapters of the 4-meter Mayall Telescope in Arizona so that it can prepare for its new role in creating the largest 3-D map of the universe. This map could help to solve the mystery of dark energy, which is driving the accelerating expansion of the universe.

Star Mergers: A New Test of Gravity, Dark Energy Theories

Observations and measurements of a neutron star merger have largely ruled out some theories relating to gravity and dark energy, and challenged a large class of theories.

Creating a World of Make-Believe to Better Understand the Real Universe

Scientists are creating simulated universes – complete with dark matter mock-ups, computer-generated galaxies, quasi quasars, and pseudo supernovae – to better understand real-world observations.

Attention Earthlings: Help Wanted in Finding a New Planet

Data research for a Berkeley Lab-led dark energy experiment benefits citizen science project that seeks the public’s help in the hunt for a hypothesized Neptune-like Planet Nine.

New Galaxy-hunting Sky Camera Sees Redder Better

A newly upgraded camera that incorporates light sensors developed at Berkeley Lab is one of the best cameras on the planet for studying outer space at red wavelengths too red for the human eye to see.

Explore Galaxies Far, Far Away at Internet Speeds

Scientists have released an “expansion pack” for a virtual tour of the universe that you can enjoy from the comfort of your own computer. The latest version of the publicly accessible images of the sky roughly doubles the size of the searchable universe from the project’s original release in May.

DESI, an Ambitious Probe of Dark Energy, Achieves its Next Major Milestone

The U.S. Department of Energy has announced approval of Critical Decision 2 (CD–2), authorizing the scientific scope, schedule, and funding profile of DESI, the Dark Energy Spectroscopic Instrument, an exceptional apparatus designed to improve our understanding of the role of dark energy in the expansion history of the universe.

How a New Telescope Will Measure the Expansion of the Universe

Michael Levi and David Schlegel, physicists at Berkeley Lab, discuss the future of the DESI project and how its forthcoming map will help scientists better understand dark energy.

Dark Energy Spectroscopic Instrument (DESI) Wins $1.1M Award

The Heising-Simons Foundation has awarded $1.1M to the DESI project with the goal of helping to fabricate the unique optics needed to capture spectra of the young expanding universe.