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Dark energy

Mock data, real science

In scientific circles, “mock” is not always a four-letter word. Through mock-data competitions, astrophysicists check their work.


The Dark Energy Survey begins

Over the next five years, scientists will capture some of the grandest images of the cosmos ever seen and use them to probe the mystery of dark energy.


Q&A with Nobel Laureate Saul Perlmutter

Perlmutter chats with Symmetry about the fate of the universe and a certain phone call from the Swedish Academy.


Secrets of the early universe

Planck, the space telescope that this year revealed unprecedentedly detailed information about the early universe, is just getting started.


Dark Energy Survey launches new photo blog

Scientists on the Dark Energy Survey share weekly photos taken by and of the world’s most powerful digital camera.


Arturo Gomez: Life among the telescopes

Arturo Gomez has spent more than 40 years working with visiting astronomers at Cerro Tololo Inter-American Observatory in Chile.


Astronomers give Dark Energy Camera rave reviews

Even before the Dark Energy Survey begins, the Dark Energy Camera is exceeding expectations in the astrophysics community.


Planck reveals new insight into universe

The first cosmology results from the Planck satellite reveal an older universe populated with less dark energy and more matter than expected.



Spectroscopy is a technique that astronomers use to measure and analyze the hundreds of colors contained in the light emitted by stars, galaxies and other celestial objects.


Illuminating the dark universe

The pursuit of dark matter and dark energy is one of the most exciting—and most challenging—areas of science. Now researchers think they’re beginning to close in.


Dark energy goes to Nerd Nite

More than 250 self-proclaimed nerds pack a bar in the heart of San Francisco to learn something new.


A galaxy with a view

A physicist, a software developer and a writer step outside one night to take in nature’s beauty at a mountaintop observatory in Chile.


The discoveries continue

The discoveries of 2012 point the way to more exciting physics in 2013 and the decades beyond.


Scientists propose new projects to unravel dark energy secrets

Scientists have risen to the challenge to design an experiment that will make measurements of millions of galaxies to probe dark energy in new ways.


BOSS collaboration measures expansion of the universe 11 billion years ago

The BOSS collaboration has looked so far back in time that they observed the period before dark energy began to dominate the largest scales of the universe.


World’s most powerful digital camera records first images

The Dark Energy Camera, a 570-megapixel camera mounted on a telescope in Chile, achieved first light on Sept. 12.