An in-depth view of the panspermia hypothesis examined against the latest knowledge of planetary formation and related processes.
Table of ContentsPreface
Part I: Philosophical Aspects of Panspermia
1. “On the Origin of Life”Lord Kelvin (William Thomson)
2. Why We Should Take Interstellar Panspermia Seriously Amedeo Balbi
2.1 Introduction
2.2 The Case for Interstellar Panspermia
2.3 Theoretical Consequences of Interstellar Panspermia
2.4 Conclusions
References
3. The Extended Continuity Thesis, Chronocentrism, and Directed PanspermiaMilan M. Ćirković
3.1 Introduction: The Continuity as a Pre-Requisite for Scientific Grounding of Astrobiology
3.2 Versions and Resistance
3.3 Cultural Evolution and Directed Panspermia
3.4 Conclusion and Prospects
Acknowledgements
References
4. Life in the Milky Way: The Panspermia ProspectsBranislav Vukotić and Richard Gordon
4.1 Introduction
4.2 Three Levels of Habitability and Panspermia
4.2.1 Stellar System Level
4.2.2 Galaxies: Cosmic Cradles of Life
4.2.3 Cosmological Level: Interactions of Galaxies
4.3 Conclusions
Acknowledgements
References
Part II: Microorganisms and Panspermia
5. Planetary Protection: Too LateMargarita Safonova and C. Sivaram
5.1 Introduction
5.2 What is Planetary Protection
5.3 Extent of Earth Biosphere
5.4 Extension to Other Planetary Bodies
5.4.1 Moon
5.4.2 Mars
5.4.3 Icy Moons
5.5 Backward Contamination
5.6 Interplanetary Exchange
5.7 Habitable Conditions for Interplanetary Micronauts
5.8 Conclusion
Appendix A
Appendix B
Appendix C
Acknowledgments
References
6. Microbial Survival and Adaptation in Extreme Terrestrial Environments—The Case of the Dallol Geothermal Area in EthiopiaCavalazzi Barbara and Filippidou Sevasti
6.1 Introduction
6.2 Planetary Field Analog: The Case of the Dallol Geothermal Area
6.2.1 The Dallol Hot Springs
6.2.2 Dallol Geothermal Area Planetary Field Analogs
6.3 Life in Extreme Environments
6.4 Conclusion and Remarks on Panspermia
Acknowledgment
References
7. Escape From Planet Earth: From Directed Panspermia to Terraformation Roy D. Sleator and Niall Smith
Acknowledgements
References
Part III: Formation and Evolution of Planets: Material Exchange Prospects
8. Catalyzed Lithopanspermia Through Disk Capture of Biologically Active Interstellar MaterialEvgeni Grishin and Hagai B. Perets
8.1 Introduction
8.2 Capture of Interstellar Planetesimals
8.2.1 Planetesimal Size Distribution
8.2.2 Encounter Rates
8.2.3 Capture Condition
8.2.4 Capture Probability
8.2.5 Total Number of Captured Planetesimals
8.3 Catalyzed Lithopanspermia
8.3.1 Types of Panspermia
8.3.2 Fraction of Life-Bearing Rocks
8.3.3 Delivery Rates
8.4 Conclusion and Discussion
Acknowledgements
References
9. Lithopanspermia at the Center of Spiral GalaxiesHoward Chen
9.1 Introduction
9.2 The Kepler Transit Survey and the Distribution of Living Worlds
9.3 XUV Hydrodynamic Escape and the Formation of Habitable Evaporated Cores 9.3.1 Activity of Supermassive Black Holes
9.3.2 Overabundance of HECs Driven by Quasar Illumination
9.4 Frequency of Exchange in High Stellar Densities
9.4.1 Ejection of Planetary Bodies on Intragalactic Scales
9.4.2 Implications for Other Stellar Populations
9.5 Detecting Panspermia
9.6 Concluding Remarks
References
10. Wet PanspermiaJaroslav Jiřík and Richard Gordon
10.1 Introduction
10.2 Earth and Its Isotopic World: Geological and Environmental Implications
10.3 Quest for the Primordial Water Worlds
10.4 Looking for the Biotic Traces in Extraterrestrial Material
10.5 Ices of the Moon and Proposal of Earth-Induced Wet Panspermia in the Solar System
10.6 Implications for Other Planets of the Inner Solar System?
10.7 Conclusions
References
11. There Were Plenty of Day/Night Cycles That Could Have Accelerated an Origin of Life on Earth, Without Requiring PanspermiaRichard Gordon and George Mikhailovsky
Acknowledgement
References
12. Micrometeoroids as Carriers of Organics: Modeling of the Atmospheric Entry and Chemical Decomposition of Sub-Millimeter GrainsG. Micca Longo and S. Longo
12.1 Micrometeorites and the Search for Life
12.2 White Soft Minerals
12.2.1 Carbonates in Space
12.2.2 Sulfates in Space
12.3 Atmospheric Entry Model
12.4 Results
12.4.1 Atmospheric Entry of MgCO3 Micrometeoroids
12.4.2 Atmospheric Entry of CaCO3 Micrometeoroids
12.4.3 Atmospheric Entry of FeCO3 Micrometeoroids
12.4.4 Atmospheric Entry of CaSO4 Micrometeoroids
12.5 The Role of Primordial Atmospheres
12.5.1 Isothermal Atmosphere Model
12.5.2 Hydrogen Atmosphere
12.5.3 Carbon Dioxide Atmosphere
12.5.4 Methane Atmosphere
12.6 Conclusions
References
13. Dynamical Evolution of Planetary Systems: Role of PlanetesimalsVladimir Ðošović
13.1 Introduction
13.2 Planetesimal Formation and Evolution
13.3 Transporting Mechanism in Later Stages of Planetary System Evolution
13.4 Conclusion
Acknowledgements
References
Part IV: Further Prospects
14. A Survey of Solar System and Galactic Objects With Pristine Surfaces That Record History and Perhaps Panspermia, With a Plan for ExplorationBranislav Vukotić and Richard Gordon
14.1 Introduction
14.1.1 Radiative Events
14.1.2 Solar Flares
14.1.2.1 Superenovae and Gamma-Ray Bursts
14.1.2.2 Galactic Shocks
14.1.2.3 Background Radiation From Galactic Sources
14.1.3 Collisions
14.1.4 Panspermia
14.2 Recording Properties
14.3 Pristine Potential of Solar System Bodies
14.3.1 Comets, Asteroids and Dwarf Planets
14.3.2 Mercury
14.3.3 Moon
14.3.4 Mars
14.3.5 Main Asteroid Belt
14.3.6 Jupiter and Saturn
14.3.7 Uranus and Neptune
14.3.8 Kuiper Belt
14.3.9 Oort Cloud
14.3.10 Meteorites
14.3.11 Extra-Solar Bodies
14.4 Prospects and Conclusions
Acknowledgements
References
15. The Panspermia Publications of Sir Fred HoyleRichard Gordon
IndexAcknowledgements
References
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