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Habitability and Cosmic Catastrophes
ISBN-13:
9783540769453
Veröffentl:
2008
Seiten:
248
Autor:
Arnold Hanslmeier
Serie:
Advances in Astrobiology and Biogeophysics
eBook Typ:
PDF
eBook Format:
EPUB
Kopierschutz:
1 - PDF Watermark
Sprache:
Englisch
Beschreibung:
The solar system has a rather well-known history. Looking at the present situation, one might get the impression that it was a rather stable and well-defined system: the orbits of the planets appear to be stable, climate and atmospheres on the planets have been determined, the risk of collision with other bodies (comets, asteroids, meteorites) seems to be small. However it is known today that the evolution of life on Earth was neither a steady progression nor uniform. There were several periods of mass extinction. These catastrophic events played a crucial role in the rise of new species. Events of astrophysical origin include:
"The solar system has a rather well-known history. Looking at the present situation, one might get the impression that it was a rather stable and well-defined system: the orbits of the planets appear to be stable, climate and atmospheres on the planets have been determined, the risk of collision with other bodies (comets, asteroids, meteorites) seems to be small. However it is known today that the evolution of life on Earth was neither a steady progression nor uniform. There were several periods of mass extinction. These catastrophic events played a crucial role in the rise of new species. Events of astrophysical origin include: Asteroid impacts - Major solar variability (space weather) - Nearby supernovae - The passage of the solar system through dense interstellar clouds.
Habitable zones.- Properties and Environments of Life.- Stars and Galaxies.- Planetary Systems.- Catastrophes in Our Solar System?.- Catastrophes in Extrasolar Planetary Systems?.- The Solar Neighborhood.- The Search for Extraterrestrial Life.
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