Chapter 1: A Universe of Life
Chapter 1: A Universe of Life ASTR 115
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This 2 page Class Notes was uploaded by Evan Kirkpatrick on Sunday October 4, 2015. The Class Notes belongs to ASTR 115 at University of Washington taught by in Fall 2015. Since its upload, it has received 39 views. For similar materials see INTRO ASTROBIOLOGY (NW) in Environmental Science at University of Washington.
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Date Created: 10/04/15
Chapter 1 A Universe of Life Vocab Habitable Worlds Worlds that contain the basic necessities for life Extrasolar planets Planets orbiting other stars Search for Extraterrestrial Intelligence SETI The search for signals from other nonhuman civilizations What are we searching for Extraterrestrial life is any living organism simple complex or intelligent Hard to determine what we are looking for because it is dif cult to de nel e o This limitation causes us to search for things similar to those on Ea h Why has scienti c interest peaked recently in other life Development in planetary science and biology lead us to believe small microbes may be able to live on other planets like Mars Recently gained evidence that the universe has thousands of other planets Improved technology allows us to study space What we need to nd life We use computers and math to run simulations 3 most important disciplines are astronomy planetary science and biology Astronomy Early people didn t believe in other life Greeks believed in Geocentric view or the view that Earth is the center of the universe We have gured out the the same physical laws that apply on Earth apply elsewhere Planetary Science The study of planets planet formation and moons Planetary science helps us understand how planets work 0 Understanding how planets works enables us to gure out if it is habitable Biology Important in knowing what we need to look for Helps determine if biology is universal orjust unique to Earth Understanding organic molecules and the process from biology to chemistry Found that life can survive in very extreme conditions Places to Search Planets comets and moons in our own solar system Any place with liquid water Mars is the most promising Moons on Jupiter may have large bodies of underground water May be life near other stars but we don t have the technology to research there Astrobiology The study of life in the universe It s a very young eld so researches don t know what to focus on yet Astrobiology focuses on 3 things 0 1 Conditions needed for life to exist and survive o 2 Finding planets to meet these conditions 0 3 Looking for life on those planets About nding the connection between living organisms and their habitats