NATS1745 History of AstronomyThe Search for Life in the UniverseThis study guide covers the major points in the lecture material forThe Search for Lifein the Universe Parts 1-8.Answer the questions below using the material in thoselecture videos. Use this guide to know what type of content you will find on an upcomingquiz or test.There are no marks/assessment associated with this study guide.1. Extremophiles and The Habitable Zone:a.What discovery was made when Pete Conrad returned from his mission to theMoon? Why is this discovery important?b.What are extremophiles? What are some of the extreme environments on Earthwhere extremophiles are found? What do the existence of extremophiles suggestabout the possibility of finding life on other planets?c.What is the Habitable Zone?d.Which planet(s) in our solar system are in our Sun’s habitable zone? Explain whythis may have been different in the past and may be different in the future.