4. Which scientist first proposed the heliocentric model of the solar system? a. Aristotle b. Ptolemy c. Einstein d. Aristarchus 5. Which scientist was the first woman to discover a comet and calculate its path? a. Caroline Herschel b. Henrietta Swan Leavitt c. Annie Jump Cannon d. Jocelyn Bell Burnell 6. Galileo constructed an improved telescope, allowing him to discover which planet's moons? a. Venus b. Mars c. Jupiter d. Uranus 7. Which scientist used data and observations from Tycho Brahe to propose his principals regarding the orbits of the planets? a. Aristotle b. Copernicus c. Kepler d. Sagan 8. Which scientists are credited with making astronomy and cosmology relatable to the public? Select all that apply. a. Michio Kaku b. Frank Drake c. Carl Sagan d. Stephen Hawking e. Johannes Kepler f. Neil deGrasse Tyson g. Jocelyn Bell Burnell

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