  In the past decade, observational cosmology has had one of the most exciting
periods in the past century. The precision with which we have been able to
measure cosmological parameters has increased tremendously, while at the same
time, we have been surprised beyond our wildest dreams by the results. I review
here recent measurements of the expansion rate, geometry, age, matter content,
and equation of state of the universe, and discuss the implications for our
understanding of cosmology.

Astrophysics