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Phys 1830: Lecture 33 - University of Manitoba Physics Department
Phys 1830: Lecture 33 - University of Manitoba Physics Department

... Recall column ...
Bringing E.T. into Your Classroom The Search for
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... Jupiter migrated from 5.7 AU to 5 AU from the Sun. For a short period in the past, Jupiter and Saturn had a 2:1 resonance in orbital periods. The combined perturbation in the Asteroid Belt and Kuiper Belt caused the episode of late heavy bombardment recorded on the lunar surface. ...
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PPT: The Scientific Revolution

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... distance (even at a speed of 186,000 mi/s)  It takes 8 minutes for the sunlight to reach earth.  So…. The light we see from a star that is 1500 ly away, left that star 1500 years ...
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Solar System - eNetLearning

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rood_ozma50

... Stars with M > 1.2M don’t live long enough for complex life to develop. ...
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... smaller quantities of heavier elements, including oxygen, carbon, neon and iron. ...
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... smaller quantities of heavier elements, including oxygen, carbon, neon and iron. ...
Pluto`s Bald Cousin
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Shining Star A

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Is Pluto a Planet? AST 248

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Meteors, Meteoroids, and Meteorites

... October 2005, a 1400 pound meteorite was found in Kansas. Scientists believe it fell about 10,000 years ago. It was covered with several feet of soil and rock. Thousands of small meteorites have been found in Antarctica. Scientists study meteorites for clues to the types of material that made the pl ...
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...  0.95 AU The outer edge of the CHZ is mainly defined by formation of CO2 clouds.  1.15 AU This contradicts however to the fact that surface of Mars was once carved by streams of some flowing liquid. The used climate model should be modified by adding other greenhouse gases (e.g. CH4) and perhaps b ...
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Models of the solar system

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Astrobiology



Astrobiology is the study of the origin, evolution, distribution, and future of life in the universe: extraterrestrial life and life on Earth. This interdisciplinary field encompasses the search for habitable environments in our Solar System and habitable planets outside our Solar System, the search for evidence of prebiotic chemistry, laboratory and field research into the origins and early evolution of life on Earth, and studies of the potential for life to adapt to challenges on Earth and in outer space. Astrobiology addresses the question of whether life exists beyond Earth, and how humans can detect it if it does. (The term exobiology is similar but more specific—it covers the search for life beyond Earth, and the effects of extraterrestrial environments on living things.)Astrobiology makes use of physics, chemistry, astronomy, biology, molecular biology, ecology, planetary science, geography, and geology to investigate the possibility of life on other worlds and help recognize biospheres that might be different from the biosphere on Earth. The origin and early evolution of life is an inseparable part of the discipline of astrobiology. Astrobiology concerns itself with interpretation of existing scientific data; given more detailed and reliable data from other parts of the universe, the roots of astrobiology itself—physics, chemistry and biology—may have their theoretical bases challenged. Although speculation is entertained to give context, astrobiology concerns itself primarily with hypotheses that fit firmly into existing scientific theories.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. According to research published in August 2015, very large galaxies may be more favorable to the creation and development of habitable planets than smaller galaxies, like the Milky Way galaxy. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently.Current studies on the planet Mars by the Curiosity and Opportunity rovers are now searching for evidence of ancient life as well as plains related to ancient rivers or lakes that may have been habitable. The search for evidence of habitability, taphonomy (related to fossils), and organic molecules on the planet Mars is now a primary NASA objective on Mars.
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