The field of planetary biology and chemical evolution draws together experts in astronomy, paleobiology, biochemistry, and space science who work together to understand the evolution of living systems. This field has made exciting discoveries that shed light on how organic compounds came together to form self-replicating molecules-the origin of life. This volume updates that progress and offers recommendations on research programs-including an ambitious effort centered on Mars-to advance the field over the next 10 to 15 years. The book presents a wide range of data and research results on these and other issues: The biogenic elements and their interaction in the interstellar clouds and in solar nebulae. Early planetary environments and the conditions that lead to the origin of life. The evolution of cellular and multicellular life. The search for life outside the solar system. This volume will become required reading for anyone involved in the search for life's beginnings-including exobiologists, geoscientists, planetary scientists, and U.S. space and science policymakers.
In recent years, planetary science has seen a tremendous growth in new knowledge. Deposits of water ice exist at the Moon's poles. Discoveries on the surface of Mars point to an early warm wet climate, and perhaps conditions under which life could have emerged. Liquid methane rain falls on Saturn's moon Titan, creating rivers, lakes, and geologic landscapes with uncanny resemblances to Earth's. Vision and Voyages for Planetary Science in the Decade 2013-2022 surveys the current state of knowledge of the solar system and recommends a suite of planetary science flagship missions for the decade 2013-2022 that could provide a steady stream of important new discoveries about the solar system. Research priorities defined in the report were selected through a rigorous review that included input from five expert panels. NASA's highest priority large mission should be the Mars Astrobiology Explorer Cacher (MAX-C), a mission to Mars that could help determine whether the planet ever supported life and could also help answer questions about its geologic and climatic history. Other projects should include a mission to Jupiter's icy moon Europa and its subsurface ocean, and the Uranus Orbiter and Probe mission to investigate that planet's interior structure, atmosphere, and composition. For medium-size missions, Vision and Voyages for Planetary Science in the Decade 2013-2022 recommends that NASA select two new missions to be included in its New Frontiers program, which explores the solar system with frequent, mid-size spacecraft missions. If NASA cannot stay within budget for any of these proposed flagship projects, it should focus on smaller, less expensive missions first. Vision and Voyages for Planetary Science in the Decade 2013-2022 suggests that the National Science Foundation expand its funding for existing laboratories and establish new facilities as needed. It also recommends that the program enlist the participation of international partners. This report is a vital resource for government agencies supporting space science, the planetary science community, and the public.
The early development of life, a fundamental question for humankind, requires the presence of a suitable planetary climate. Our understanding of how habitable planets come to be begins with the worlds closest to home. Venus, Earth, and Mars differ only modestly in their mass and distance from the Sun, yet their current climates could scarcely be more divergent. Only Earth has abundant liquid water, Venus has a runaway greenhouse, and evidence for life-supporting conditions on Mars points to a bygone era. In addition, an Earth-like hydrologic cycle has been revealed in a surprising place: Saturn’s cloud-covered satellite Titan has liquid hydrocarbon rain, lakes, and river networks. Deducing the initial conditions for these diverse worlds and unraveling how and why they diverged to their current climates is a challenge at the forefront of planetary science. Through the contributions of more than sixty leading experts in the field, Comparative Climatology of Terrestrial Planets sets forth the foundations for this emerging new science and brings the reader to the forefront of our current understanding of atmospheric formation and climate evolution. Particular emphasis is given to surface-atmosphere interactions, evolving stellar flux, mantle processes, photochemistry, and interactions with the interplanetary environment, all of which influence the climatology of terrestrial planets. From this cornerstone, both current professionals and most especially new students are brought to the threshold, enabling the next generation of new advances in our own solar system and beyond. Contents Part I: Foundations Jim Hansen Mark Bullock Scot Rafkin Caitlin Griffith Shawn Domagal-Goldman and Antigona Segura Kevin Zahnle Part II: The Greenhouse Effect and Atmospheric Dynamics Curt Covey G. Schubert and J. Mitchell Tim Dowling Francois Forget and Sebastien Lebonnois Vladimir Krasnopolsky Adam Showman Part III: Clouds, Hazes, and Precipitation Larry Esposito A. Määttänen, K. Pérot, F. Montmessin, and A. Hauchecorne Nilton Renno Zibi Turtle Mark Marley Part IV: Surface-Atmosphere Interactions Colin Goldblatt Teresa Segura et al. John Grotzinger Adrian Lenardic D. A. Brain, F. Leblanc, J. G. Luhmann, T. E. Moore, and F. Tian Part V: Solar Influences on Planetary Climate Aaron Zent Jerry Harder F. Tian, E. Chassefiere, F. Leblanc, and D. Brain David Des Marais
"...the 'proof' of man's destruction of the environment isconsistently flawed.... the scientific method is being abused andignored. The errors are not random, however, but are systematicallybiased toward attempting to prove the guilt of man in the allegeddestruction of the planet. Objective science is disappearing and isbeing replaced by the pursuit of a philosophical agenda." --Richard F. Sanford in Environmentalism and theAssault on Reason Chapter 1 "The public has numerous misconceptions about the relationshipbetween environmental pollution and human cancer. Underlying thesemisconceptions is an erroneous belief that nature is benign." --Bruce N. Ames, Ph.D. and Lois Swirsky Gold, Ph.D inEnvironmental Pollution and Cancer: Some Misconceptions Chapter7 "Greenhouse gases have been increasing in the atmosphere,largely as a result of human activities. However, the climaterecord does not show the temperature increase and other telltalesigns of the expected greenhouse effect. The mathematical modelsused for predicting such effects are evidently not complete enoughto encompass all of the relevant physical processes in theatmosphere, thus throwing grave doubt on the drastic warminghypothesized for the next century." --S. Fred Singer in Global Climate Change: Facts andFiction Chapter 13 "...There is now no prima-facie case for any expensive policy ofsafeguarding species without more extensive analysis than has sofar been done." --Julian L. Simon in Disappearing Species,Deforestation and Data Chapter 26
"Through the contributions of more than sixty leading experts in the field, Comparative Climatology of Terrestrial Planets sets forth the foundations for this emerging new science and brings the reader to the forefront of our current understanding of atmospheric formation and climate evolution"--Provided by publisher.