In this Python physics tutorial, I show you how to draw the celestial sphere using Web VPython! Explore the stars, constellations, and the fundamental concepts behind the celestial coordinate system ...

Numerical calculations are grand. Of course, they are just another form of normal calculations - like I have said before. So, I have mostly used [VPython](http ...

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 ...

Village problem? Is that even the correct name? Who knows? Here is the puzzle: There are four villages arranged such that they occupy the 4 corners of a perfect square. What arrangement of roads could ...