ASTR 1346 1st Edition Lecture 20 Outline of Last Lecture I Cosmic Distance Ladder Continued A Tully Fisher Technique B Standard Candles C Hubble s Law Outline of Current Lecture I Cosmic Evolution II History of the Universe III Drake Equation IV Telescopes Current Lecture l Cosmic Evolution is the continuous process that led to the appearance of galaxies stars planets and life on Earth ll The history of the Universe goes from Particulate Galactic Stellar Planetary Chemical Biological and Cultural Chemical Evolution is when simple molecules begin to form and then biological evolution occurs Humans have existed for only 3 million years lll The Drake equation is a math equation based on stats and assumption to estimate the probability that intelligence exists elsewhere Reliability decreases from first to last R is about 10 suitable stars F G and K type formed per year in the Milky Way fp is at least one ne is 1 10 the rest besides L are 1 The average lifetime of a technologically competent civilization in years means thousands of civilizations could currently exist lV These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute The SETI telescope stands for Search for Extra Terrestrial Intelligence They use radio telescope to send messages out into space and to listen for messages from other planets The Arecibo Radio telescope is the largest telescope in the world
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