Decade-long Dark Energy Survey offers new insights into the expansion of the universe

One of the supernovas discovered in the Dark Energy Survey (left) compared tio distant quasar (right).

A survey of over 1,500 supernovas conducted by the Dark Energy Camera has placed strong constraints on the accelerating expansion of the universe. 

The results suggest that the mysterious force that drives this cosmic acceleration, dark energy, may change over time, varying in density, which calls the standard model of cosmology into question.