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Across 3. sun-centered, the system of the universe in which the Earth and planets revolve around the sun 7. a systematic procedure for collecting and analyzing evidence that is crucial to the evolution of science in the modern world 8. a system of planetary motion in which the sun, moon, and other planetary bodies revolve around Earth 9. a French philosopher, art critic, and writer best known for serving as a co-founder and chief editor of the Encyclopedie

Down 1. the doctrine that scientists should proceed from the particular to the general by making systematic observations and carefully organized experiments to test hypotheses and theories 2. a person who seeks wisdom or enlightenment; a scholar or thinker 4. a system of thought based on the belief that reason is the chief source of knowledge 5. a group of people born and living at the same time 6. an alteration proposed or affected by parliamentary or constitutional procedure