Before heliocentrism was proposed, Earth was thought to be at the center of the universe. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Today, I wanted to talk about the history of the heliocentric model. After all, Copernicus’ most notable accomplishment is probably his proposed heliocentric, or sun-centered, model for the universe.

The Solar System consists of the eight planets that orbit our Sun and other celestial bodies such as moons, comets, asteroids, minor planets, and dust and gas. The Sun is considered as the centre of ...

One of my favorite classes to teach is Physics for Elementary Education. It's a physics class designed to address the needs of future elementary school teachers—grades 1 through 6 or so. To guide the ...

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 ...

The Solar System formed from a cloud of gas, which gave rise to a proto-star, a proto-planetary disk, and eventually the seeds of what would become planets. The crowning achievement of our own Solar ...