We may be a little closer to a direct detection of dark energy thanks to a new result that came about, in a sense, by accident.

On the 16th day of advent we explore the mysterious force that drives our Universe apart.

What is dark energy and how do we know it's there?

Some of the Universe's most important secrets are hidden in the shape of a beautiful undulating curve: the power spectrum of the cosmic microwave spectrum. This article explains how.

The Universe's expansion may not be accelerating as fast as we thought.

How big is the Universe? Where did it come from and where is it going? Why is it the way it is? These are just some of the questions cosmologists study.

Images are now being taken on the world's most powerful digital camera. For over 500 nights over the next five years the Dark Energy Camera will photograph the light from more than 100,000 galaxies up to 8 billion light-years away in each image.

This year's Nobel Prize in Physics was awarded for a discovery that proved Einstein wrong and right at the same time.