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Experiencing Venus: Clues to the origin, evolution, and chemistry of terrestrial planets via in-situ exploration of our sister world

2007; American Geophysical Union; Linguagem: Inglês

10.1029/176gm11

2328-8779

K. H. Baines, S. K. Atreya, R. W. Carlson, David Crisp, David Grinspoon, C. T. Russell, G. Schubert, Kevin Zahnle,

Stellar, planetary, and galactic studies

We review the current state of knowledge of (1) the origin and evolution of Venus and (2) the photochemical and thermochemical processes occurring in the middle and lower atmosphere there.For each, we review the promise of on-going and planned orbital observations by ESA's Venus Express and Japan's Venus Climate Orbiter missions.We review the need for future in-situ measurements for understanding Venus origin and evolution and present-day chemistry, and the implications for understanding the origin and history of the Earth and other bodies in the inner solar system, as well as for understanding terrestrial planets in other solar systems.We prioritize the goals remaining in the post Venus Express era, based on the Decadal Survey (National Research Council, 2003).Using past experience with Pioneer Venus, VEGAs, Veneras, and, most recently, Venus Express as guides, we suggest appropriate techniques and measurements to address these fundamental science issues.