The Leiden Sphaera — the dynamic model of the solar system pictured above — was built around 1670 by Dutch clockmaker Steven Tracy. The impressive cosmic model measures 1.5 meters across, and is ...

When asked who was the first to propose the heliocentric theory—that is, the one in which the Sun is the center of the universe and the planets revolve around it—the usual answer is Copernicus.

Why is Copernicus so celebrated in science? originally appeared on Quora - the knowledge sharing network where compelling questions are answered by people with unique insights. Answer by Alejandro ...

These days, we are treated to glorious images of the cosmos through astrophotography and sophisticated three-dimensional visualizations of the universe. In the early centuries of astronomy, however, ...

This chart, from around 1660, shows the signs of the zodiac and a model of the solar system with Earth at the centre. For decades or even centuries after Kepler clearly demonstrated that not only is ...

The Copernican Principle, named in honor of Nicolaus Copernicus (who proposed the heliocentric model of the universe), states that Earth and humans do not occupy a special or privileged place in the ...