Venus is about the same mass and composition as the Earth.
However, surface conditions are radically different. The 243-day
rotation rate has allowed photochemical dissociation to transform
all water and other gases into a dense carbon dioxide and
nitrogen atmosphere and a greenhouse effect has transformed
to surface temperature into an inferno. The Russian landers
together with the American Pioneer and Magellan radar imagery
provide views of a world of lava flows, craters with flow
ejecta, volcanoes, volcanic domes and a wide array of other
igneous features comparable to many recorded on Earth.
Dr Peterson returns to the OCA to give another of his
very stimulating and thought provoking talks. Prior
talks have been on topics such as "Why is Mars
This is a meeting not to be missed!
Dr Gary L. Peterson, Professor of Geology
San Diego State University / San Diego CA 92182-1020
Ph. (619) 594-5594 FAX (619) 594-4372
THE INDEPENDENT PLANETOLOGIST