Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

How do you make a numerical model that shows the motion of the Earth-Sun-moon system? Here, I use vpython to create the calculation.

But there's a problem with just going ahead and assuming that the Earth orbits the sun. For a long time, humans believed in a different model of the solar system: the geocentric, or Earth-centered ...

The relative rotation of the Earth, moon, and sun is about 97 percent accurate in this working Lego orrery.

Searching for Earth-like life remains the ultimate goal of planetary science, and identifying Earth-like planets in the habitable zones of sun-like stars is a key step.

The National Aeronautics and Space Administration (NASA) has posted footage online filmed by its Solar Dynamics Observatory that captures the Earth and moon moving across the sun together.