Studying the Universe With Gravitational Lenses

Dr. Phil Marshall
Stanford University

Darwin 103
4:00 PM

Dr. Phil Marshall of Stanford University will explain how we can perform astronomical calculations using gravitational lenses: these cosmic telescopes are rare, but they allow us to observe the most distant, faintest, and smallest objects; in calibrating their optics we learn the masses of galaxies and clusters, and even the rate of expansion of the Universe. [Available on DVD in the SSU library.]