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
grades
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.