There was a recent news item about Star Trek's Kate Mulgrew in a geocentric movie. The geocentric model states that the Sun and the planets move around the Earth instead of the heliocentric model with ...

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 ...

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.

Galileo's 1610 telescopic observations of Venus's phases provided evidence supporting a heliocentric model, as these phases could only occur if Venus orbited closer to the Sun than Earth. Stellar ...

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.