Dark Energy

An advanced camera on a South American telescope will search for clues to why the universe's expansion is speeding up.

Peering through a giant cluster of galaxies as if it were a cosmic magnifying glass, astronomers have created a new, incredibly detailed map of the dark matter found there.

By peering at the distant parts of universe through a galactic magnifying lens, astronomers may have found a way to better understand mysterious dark energy.

A much-anticipated report lays out the big telescopes that will push scientific discovery during the next decade or two.