Across
- 2. developed astronomical instruments and in measuring and fixing the positions of stars paved the way for future discoveries.
- 7. an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects
- 9. uses three lenses and a stage light, which illuminated and enlarged the specimens.
Down
- 1. the first to report telescopic observations of the mountains on the moon, the moons of Jupiter, the phases of Venus, and the rings of Saturn
- 3. a mathematician and astronomer, who formulated a model of the universe that placed the Sun rather than Earth at its center.
- 4. “I think, therefore I am”
- 5. formulated the three laws of motion—the basic principles of modern physics
- 6. a German astronomer, mathematician, astrologer, natural philosopher and writer on music.
- 8. the first great advocate of empiricism and also the separation of science and theology.