sci151r2week5content-1 - Life in the solar system Earth is...

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SCI 151 Astronomy Week Five Content Outline TOPICS AND OBJECTIVES Extraterrestrial Life/Astronomy Research Examine the properties of life on Earth. Examine the possibilities of extraterrestrial life in our solar system. Describe the types of stars that could have life-bearing planets. Examine the search for extraterrestrial intelligence. Describe the science of astronomy being validated, updated, and perfected by continuous astronomical research. CONTENT OUTLINE Extraterrestrial life – what is life? Definition of life Life consists of organisms that have metabolism and can reproduce themselves. Life can exist in many environments. Chemistry of life Life requires water because water is a universal solvent. Life requires the carbon atom because the carbon atom can make complex molecules. Extraterrestrial life – in our solar system
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Unformatted text preview: Life in the solar system Earth is an example Environments of Mars give it a chance of harboring life Extraterrestrial Life – types of stars Star candidates Planetary systems around other stars High mass stars evolve quickly Small mass stars are small habitable zones G, F spectral class stars are a compromise weighing the two factors. Extraterrestrial life – probability, communication, EFOs Probability analysis of extraterrestrial life Must be single stars Must be F, G 100 billion stars in Milky Way Galaxy Communicating with extraterrestrial life Wavelength and frequency Structure of message Unidentified Flying Objects (UFOs) Definition of UFO Definition of EFO Difficulty of accurate data Unusual phenomena Astronomy research Page 1 of 1 SCI151r2...
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