All the particles we know to exist make up only about five per cent of the mass and energy of the universe. The rest – "Dark Matter" and "Dark Energy" – remains mysterious.
Quintessence and phantom fields, two hypotheses formulated using data from satellites, such as Planck and WMAP, are among the many theories that try to explain the nature of dark energy. Now researchers from Barcelona and Athens suggest that both possibilities are only a mirage in the observations and it is the quantum vacuum which could be behind this energy that moves our universe.
NASA has signed up to join the European Space Agency's (ESA's) Euclid mission, a space telescope due to launch in 2020 and designed to investigate dark matter and dark energy.
It sounds like a contradiction in terms but scientists have reached temperatures that go beyond absolute zero in a lab, and get hotter as they do so.
Scientists using BOSS, the Baryon Oscillation Spectroscopic Survey, have used a new mapping technique to probe the period before dark energy began to speed up the expansion of the universe.
The newly-built Dark Energy Camera in Chile - the most powerful digital camera in the world - has captured its first images, as part of an effort to understand why the expansion of the universe is speeding up.
Dark energy is real, say scientists who claim they've validated the disputed 2003 research that was seen as the first clear evidence for its existence.
Two mathematicians have, rather bravely, proposed a unified theory of dark matter and dark energy that alters Einstein's equations describing the fundamentals of gravity.
The biggest-ever 3D map of the universe has been released, including more than 500,000 galaxies and 100,000 stars.
Dark energy is believed to make up approximately 70 percent of the current content of the universe.
After two years' work, the Sloan Digital Sky Survey (SDSS-III) has measureed the precise distances of over a quarter of a million galaxies.
After a five-year survey of 200,000 galaxies, astronomers believe they've confirmed that dark energy is driving our universe apart at an ever-accelerating rate.
Using a galaxy cluster as a magnifying lens, an international team of astronomers has used the NASA/ESA Hubble Space Telescope to examine distant regions of the universe.
Everything we know about the composition of the universe may be wrong, according to physicists.
Dark Energy has announced that its upcoming downloadable title "Hydrophobia" will be released exclusively for the Xbox 360. A demo of the game is also being showcased over the weekend at PAX East in Boston, Mass.
The European Space Agency (ESA) has picked out dark energy, habitable planets and a detailed solar survey as candidates for two missions to be launched sometime after 2017.