Did the Big Bang mark the beginning of time? Not if we live in a bubble multiverse!

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.

What's the mysterious stuff that makes up 70% of our Universe?

On May 19 2009 the Space Shuttle Atlantis released the Hubble Space Telescope back into orbit after a hugely successful servicing mission. To mark the occasion, Mario Livio, one of the scientists involved in the mission and intimately acquainted with Hubble, takes stock of its scientific legacy.

The mathematical maps in theoretical physics have been highly successful in guiding our understanding of the universe at the largest and smallest scales. Linking these two scales together is one of the golden goals of theoretical physics. But, at the very edges of our understanding of these fields, one of the most controversial areas of physics lies where these maps merge: the cosmological constant problem.