8. Planet Knowledge
- Important Figures In These Discoveries: Nicolaus Copernicus, Galileo Galilei, Léon-Philippe Teisserenc de Bort, Richard Aßmann, Pythagoras, Georg Hartmann, Robert Norman, Christian Doppler
Earth, as well as our sun and the solar system, were heavily debated for centuries. Copernicus was the one who discovered that the Earth rotates around the sun, which was the true center of our solar system. Galileo Galilei spoke to this as well and via his telescope, was able to find other planets like Jupiter. Yet they were playing on assumptions made by ancient astronomers from Egypt, Greece, and many others.
Greek Mathematician Pythagoras reasoned if the moon was round then the Earth must be too. Around 1900, Léon-Philippe Teisserenc de Bort and Richard Aßmann discovered the 5 atmospheric layers (Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere). Georg Hartmann and Robert Norman independently discovered the Earth’s magnetic field while Christian Doppler is responsible for discovering the Doppler Effect. All are critical scientific breakthroughs.