Astronomy > Cosmology DCS# 8C10.xx

CENTER OF EXPANSION



APPARATUS
two transparencies of galaxies printed at different scales 206
document camera or laptop
201


DESCRIPTION
Superimpose the transparencies and align them at a common point.  The universe appears to expand from that point.  Align at a different point and the universe will appear to expand about it.  Every point sees itself as the center of expansion.
REFERENCES
Paul Doherty:  http://www.exo.net/~pauld/activities/astronomy/ExpandingUniverse.html