The Nobel Prize in Physics 2011 was awarded to three astronomers "for the discovery of the accelerating expansion of the Universe through observations of distant supernovae".
After explaining the historical background to this important discovery, the lecture will address the question of what may actually cause this acceleration.
Is it an ingredient called Dark Energy, or should Einstein's gravity theory be modified? The lecture will present current observations with the Hubble Space Telescope, as well as new projects such as the "Dark Energy Survey" and the ”Euclid" space mission.
The Speaker: Ofer Lahav is Perren Professor of Astronomy and Head of Astrophysics at University College London (UCL).
He received his PhD from Cambridge University, where he was later a member of staff. In 2004 he moved from Cambridge to UCL, where he established a Cosmology group which is heavily involved in new large galaxy surveys.
Among them is the international "Dark Energy Survey", where he coordinates the science activities of over 100 scientists in 5 countries.
Lahav is currently Vice-President of the Royal Astronomical and a holder of a Wolfson Royal Society research merit award.