Geography of the Universe
Discuss the way one maps the universe, finding distances to the Sun, planets, stars in our galaxy, nearby galaxies, and to the most distant galaxies and clusters of galaxies. Starting with the distance to Mars in 1673, we have built, rung by rung, a ladder that now extends our measurements across the visible universe. At each step, the understanding of closer objects allows us to map their more remote counterparts.
John Friedman, a distinguished professor emeritus at UWM, has worked on a variety of problems in gravitational physics, involving neutron stars, black holes and gravitational collapse, and the topology of spacetime. A Fellow of the American Physical Society, Friedman served ... read more