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5 results on '"Mark A. Bullock"'

1. Scientific Exploration of Venus with Aerial Platforms

Author

Joseph O'Rourke, Attila Komjathy, Gerald Schubert, Kandis Lea Jessup, Kevin H. Baines, Raphaël F. Garcia, Michael Pauken, Jean-Baptiste Renard, Panagiotis Vergados, Eliot F. Young, Christophe Sotin, Darby Dyar, Maxim De Jong, Robert E. Grimm, Kevin McGouldrick, Sushil K. Atreya, Jason Rabinovitch, Kar-Ming Cheung, Kerry T. Nock, Paul K. Byrne, David Grinspoon, Olivier Mousis, Kumar Bugga, Jeffery L. Hall, Jennifer M. Jackson, Thomas W. Thompson, Patricia Beauchamp, Daniel C. Bowman, Josette Bellan, David Senske, David Mimoun, Jonathan Grandidier, James A. Cutts, Colin Wilson, Jacob Izraelevitz, Nicolas Verdier, Shahid Aslam, Siddharth Krishnamoorthy, Mark A. Bullock, and Sébastien Lebonnois

Subjects
biology, Environmental science, Venus, biology.organism_classification, Astrobiology
Published
2021
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2. The Venus Life Equation

Author

David Grinspoon, David J. Smith, Mark A. Bullock, Grzegorz P. Słowik, Martha S. Gilmore, Diana Gentry, Noam R. Izenberg, and Penelope J. Boston

Subjects
Solar System, 010504 meteorology & atmospheric sciences, Earth, Planet, Liquid water, FOS: Physical sciences, Venus, Popular Physics (physics.pop-ph), Physics - Popular Physics, 01 natural sciences, Energy pathways, Astrobiology, Atmosphere of Venus, Extant taxon, Primary (astronomy), Exobiology, 0103 physical sciences, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Chemical Ingredients, Earth and Planetary Astrophysics (astro-ph.EP), biology, Atmosphere, Habitability, biology.organism_classification, Agricultural and Biological Sciences (miscellaneous), Aspects of Venus, Space and Planetary Science, Environmental science, Earth (chemistry), Astrophysics - Instrumentation and Methods for Astrophysics, Origination, Geology, Astrophysics - Earth and Planetary Astrophysics
Abstract

Ancient Venus and Earth may have been similar in crucial ways for the development of life, such as liquid water oceans, land-ocean interfaces, favorable chemical ingredients and energy pathways. If life ever developed on, or was transported to, early Venus from elsewhere, it might have thrived, expanded and then survived the changes that have led to an inhospitable surface on Venus today. The Venus cloud layer may provide a refugium for extant life that persisted from an earlier more habitable surface environment. We introduce the Venus Life Equation - a theory and evidence-based approach to calculate the probability of extant life on Venus, L, using three primary factors of life: Origination, Robustness, and Continuity, or L = O x R x C. We evaluate each of these factors using our current understanding of Earth and Venus environmental conditions from the Archaean to the present. We find that the probability of origination of life on Venus would be similar to that of the Earth and argue that the other factors should be nonzero, comparable to other promising astrobiological targets in the solar system. The Venus Life Equation also identifies poorly understood aspects of Venus that can be addressed by direct observations with future exploration missions., Revision resubmitted after review to Astrobiology for Venus Special issue. 37 pages, 4 figures. Shorter version submitted as white paper in shortened form to Planetary and Astrobiology Decadal Survey

Published
2021
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3. Stratospheric Venus Observatory

Author

Vijay Natraj, Constantine Tsang, Jack Fox, Giada Arney, Kandi Lea Jessup, Nancy J. Chanover, Takeshi Imamura, Christopher D. Parkinson, Yeon Joo Lee, Eliot F. Young, Takeshi Horinouchi, Mark A. Bullock, Greg Holsclaw, Yuk L. Yung, Takehiko Satoh, Viliam Klein, Robert A. Woodruff, Clayton Cantrall, Sanjay S. Limaye, William E. McClintock, Thomas Navarro, Kevin McGouldrick, M. Beasley, and Javier Peralta

Subjects
biology, Observatory, Astronomy, Venus, biology.organism_classification, Geology
Published
2021
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4. Venus Observing System

Author

Tatiana Bocanegra, Abhinav Jindal, Robert Lillis, Jack S. Elston, Irina Kovalenko, Narayan M. Komerath, Patrick M. Fry, Yeon Joo Lee, Chi O. Ao, Diana Gentry, Tibor Kremic, Tomas Svitek, William Eckles, Sarag J. Saikia, Valeria Cottini, Brandon A. Yoza, David J. Smith, Janet G. Luhmann, John P. Carrico, Mark A. Bullock, Alexander G. Hayes, Vrishank Raghav, Athul Pradeepkumar Girija, Nurul Abedin, Satoshi Sasaki, Richard A. Mathies, Daniel Sokol, Shiv K. Sharma, Shannon Curry, Natasha M. Johnson, Rosalyn A. Pertzborn, and Sanjay S. Limaye

Subjects
biology, Venus, biology.organism_classification, Geology, Astrobiology
Published
2021
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5. In Situ Exploration of Venus’ Clouds by Dynamic Soaring

Author

Tibor Kremic, Constantine Tsang, Amanda Brecht, Jonathan Sauder, Noam R. Izenberg, Maciej Stachura, Jack Elston, Ye Lu, Paul K. Byrne, David Grinspoon, Michael Pauken, Jaime A. Cordova, Sébastien Lebonnois, Bruce C. Cogan, Sanjay S. Limaye, and Mark A. Bullock

Subjects
biology, Venus, biology.organism_classification, Geology, Dynamic soaring, Astrobiology
Published
2021
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