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The Scale of the Universe |
Virginia Trimble discusses Einstein's contribution to past understanding of the
scale of the universe.
Gustav Tammann explains how
Malmquist Bias causes some to overestimate the
value of Hubble's constant.
Sidney van den Bergh relates how measurements with Cepheid variable stars might indicate
that others have underestimated Hubble's constant.
Moderator John Bahcall (left) discusses issues with Sidney van den Bergh. Bahcall
wonders if at least part of the present disagreement might stem
from bias in choosing the list of local galaxies from which Hubble's constant
is computed.
Photographs courtesy of Peter Leonard.