Department of Physics, University of Maryland, Fall 2005, Prof. T. Jacobson

Phys675

Introduction to
Relativity, Gravitation and Cosmology


   syllabus

   homework

   solutions

   notes

   notes (2004)

   supplements

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This Hubble Space Telescope image shows several blue,
loop-shaped objects that actually are multiple images of the
same galaxy. They have been duplicated by the gravitational
lens of the cluster of yellow, elliptical and spiral galaxies
near the photograph's center.