We know more today about the universe and our place within it than we ever have but a huge amount remains to be discovered. We maintain a world class observatory and are actively involved in the forefront of astronomy, looking at questions such as: "Is the expansion of the universe accelerating, and if so why?"; "What is the nature of galaxies and how do they form?"; and "What is dark matter?" Our astronomers use most of the world's major telescopes and have a leading role in many of the studies carried out with the Hubble Space Telescope.