NATS 1880 Lecture Notes - Lecture 3: Virgo Supercluster, Photon, Orion Nebula
23 Oct 2014
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Nats 1880 life beyond earth - week 4: september 30, 2014. The majority of seti searches rely upon detection of artificial radio signals. The universe is vast and old, implying a lot of real estate for life to develop upon and the time for it to evolve. The elements of life are widespread; carbon and long chain organic molecules (raw material) have been detected throughout the galaxy. Physical laws seem universal; no reasons at this time to think that the process that evolved life on earth could not occur anywhere else. Astronomy has defined where earth is in relation to other major components in the universe. The big bang theory has defined a possible. Many ways to visualize the size of our solar system. Recall, the earth is 1a(stronomical)u(nit) from the sun, 150km. A lightyear (ly) is the distance a photon of light will travel in a year.
