Survey
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* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Name: ______________________________________________________ Period: _______ Date: ____________ Famous Astronomers Directions: Match the famous astronomer to the quote that makes the most sense. Tycho Galileo Kepler Ptolemy Hubble Copernicus 1) “I’ve finally worked out a mathematical explanation as to why planets orbit the sun and moons orbit planets. It is gravity that keeps an object in orbit!” 2) “The Earth is the center of the universe, and all of the planets and stars orbit our planet. How do I know? Well, my theory includes an intricate system of orbits within orbits that explains the motion of the planets better than any other theory of my day.” 3) “Using large telescopes, I’ve discovered that all the other galaxies out there are moving away from us; in other words, the universe is expanding, as if it exploded in some sort of ‘Big Bang’! Gee, I sure hope someone names a famous space telescope after me someday!” 4) “I prefer the theory of the sun-centered universe over other theories. This handy device called a telescope has helped me to discover that the planets are not just dots of light, but physical bodies like the Earth.” 5) “After several years of very precise observations, I conclude that our universe is Earth-centered. My model has the sun and the moon revolving around the Earth, while the other planets revolve around the sun.” 6) “For centuries people have been thinking that the Earth is at the universe’s center, but I’m certain that it is, in fact, the sun at its center. This heliocentric model is the simplest explanation for the strange retrograde motion of the planets across the sky.” 7) “I do not agree with my mentor’s theory that the sun revolves around the Earth. I have used his precise data to propose another theory in which all of the planets revolve around the sun in elliptical orbits.” 8) “As one of the most famous ancient Greek philosophers, I asked questions about the universe and our place in it. Many people consider me to be one of the first scientists ever.” Newton Aristotle Geocentric vs. Heliocentric Models 1) Explain what’s going on in this picture: Retrograde Motion of Mars 2) What are the differences between the geocentric and heliocentric models? Ptolemy’s model Copernicus’ model: 3) How does each model explain the retrograde motion of the planets? 4) “Occam’s Razor” is the principle that given two possible explanations, the simplest one is usually the correct solution. How does this principle apply to these two models?