Modified Mastering Astronomy With Pearson Etext -- Standalone Access Card -- For Life In The Universe (4th Edition)
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ISBN: 9780134081656
Author: Jeffrey O. Bennett
Publisher: PEARSON EDUCATION (COLLEGE)
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Chapter E, Problem 3DQ
Extraterrestrial Life and Your Religion. Would the discovery of extraterrestrial life have any important implications for your own personal religious beliefs? Would it affect the current "official" beliefs (if any) of your religion? Explain.
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Modified Mastering Astronomy With Pearson Etext -- Standalone Access Card -- For Life In The Universe (4th Edition)
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- In this chapter, we identify these characteristic properties of life: life extracts energy from its environment, and has a means of encoding and replicating information in order to make faithful copies of itself. Does this definition fully capture what we think of as “life”? How might our definition be biased by our terrestrial environment?arrow_forwardSuppose astronomers discover a radio message from a civilization whose planet orbits a star 35 lightyears away. Their message encourages us to send a radio answer, which we decide to do. Suppose our governing bodies take 2 years to decide whether and how to answer. When our answer arrives there, their governing bodies also take two of our years to frame an answer to us. How long after we get their first message can we hope to get their reply to ours? (A question for further thinking: Once communication gets going, should we continue to wait for a reply before we send the next message?)arrow_forwardThink of our Milky Way Galaxy as a flat disk of diameter 100,000 light-years. Suppose we are one of 1000 civilizations, randomly distributed through the disk, interested in communicating via radio waves. How far away would the nearest such civilization be from us (on average)?arrow_forward
- The Drake equation In 1961 astronomer Frank Drakedeveloped an equation to try to estimate the number ofextraterrestrial civilizations in our galaxy that might be able to communicate with us via radio transmissions. Nowlargely accepted by the scientific community, the Drakeequation has helped spur efforts by radio astronomers tosearch for extraterrestrial intelligence. Here is the equation: NC = N # fp # ne # fl# fi# fc # fLOK, it looks a little messy, but here’s what it means:So, how many ETs are out there? That depends; valueschosen for the many factors in the equation depend onever-evolving scientific knowledge and one’s personalguesses. But now, some questions.a) What quantity is calculated by the first product, N # fp?b) What quantity is calculated by the product, N # fp # ne # fl?c) What probability is calculated by the product fl# fi?d) Which of the factors in the formula are conditionalprobabilities? Restate each in a way that makes thecondition clear.arrow_forwardThe Search for Extraterrestrial Intelligence (SETI) makes use of a huge, multi-billion-dollar network of radio telescopes around the world, all built solely for the purpose of contacting alien civilizations. True Falsearrow_forwardWhy are we limited to finding life on planets orbiting other stars to situations where the biosphere has created planet-scale changes?arrow_forward
- How is a habitable zone likely to change over time? a. get narrower b. move further from the star c. they aren't likely to changearrow_forwardwhere do you think we should establish a colony first? In Mars or in Moon?arrow_forwardHow can we apply the principles of Charles Darwin's theory of evolution by natural selection in our everyday life?arrow_forward
- What are the advantages to using radio waves for communication between civilizations that live around different stars? List as many as you can.arrow_forwardHow Do We know? How would you respond to someone who said, about biological evolution, “Oh, that’s only a theory.?arrow_forwardwhat does the internation space station and how is it usedarrow_forward
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