Beschreibung:
This class-tested textbook examines the basic elements of living systems: energy, chemistry, solvents, and habitats in crucial depth. These elements define the opportunities and limitations for life on other worlds. The book argues that life forms we would recognize may be more common in our solar system than many assume. It also considers, however, the possibility of exotic forms of life based on backbones other than carbon, liquids other than water, and energy other than light. The authors offer an operational definition of life and summarize prevailing thoughts on plausible pathways for the origin of life on Earth and other worlds. They discuss remarkable adaptations to extreme environments, the nature and detection of geo- and biosignatures, the future and fate of living systems, and suggestions for the optimization of future exploratory space missions.
Introduction.- Definition of Life.- Origin of Life.- Synthetic Life.- Lessons from the History of Life on Earth.- Energy Sources and Life.- Building Blocks of Life.- Life and the Need for a Solvent.- Habitats of Life.- Signatures of Life.- Life Detection-Past and Present.- Astrobiological Potential within the Solar System.- Exoplanets and Exomoons.- Ideas of Exotic Forms of Life.- The Future and Fate of Living Systems.- SETI - The Search for Extraterrestrial Intelligent Life.- Optimizing Space Exploration.- References.- Index.