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Fig. 16-7, p.363
Fig. 16-7, p.363

... • Clouds of material between the stars are sites of stars formation • Earth plus the other planets in our solar system evidently formed from a disk around the Sun as it formed; such protoplanetary disks are seen around many young stars • Planets like Earth are believed therefore to form as normal by ...
Western Civilizations Chapter 17
Western Civilizations Chapter 17

... ◦ He practiced Deductive Reasoning (general to particular) and came up with a variety of conclusions ◦ Thought universe could be divided into 2 parts: the mind and the body ◦ This is called Cartesian Dualism ◦ Believed rigorous reasoning by an individual could discover the truth about nature and th ...
Astronomy Assignment #1
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... and the other planet to be throw into a close non-circular orbit. 9. What would be a good way to search for Earth-like exoplanets around other stars? How could you tell if life was probably present on an exoplanet? NASA’s proposed Terrestrial Planet Finder Mission is designed to search for Earth-lik ...
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PTYS/ASTR 206 – Section 2 – Fall 2004 Activity #1: 8/25/04
PTYS/ASTR 206 – Section 2 – Fall 2004 Activity #1: 8/25/04

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word document

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The Earth in the Universe (solucionario)

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... west after sunset; and above it, Jupiter, nearly as bright. The third brightest star-like object in tonight’s sky really is a star, over in the southeast, and it’s called Sirius, a name derived from the Greek “seirios,” which means, scorching, or sparkling. So you could say Sirius is the star you me ...
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... • Rotates on it’s axis about once every 29 days • Therefore, we always see the same side of the Moon • Phase – change in the Moon’s appearance as it orbits the Earth ...
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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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