I know a real rocket scientist.

His name is Russell Sargent and the first spacecraft he worked on, called Cygnus, recently arrived at the international space station. He built the guidance and some of the navigation software for demos 3 through 5, and also helped to design the approach trajectory in the last figure shown here. The mission went very successfully, and now… Continue reading I know a real rocket scientist.

Chris has been watching math videos (huh?!), so I tuned in for a few, including this video introducing differential equations. They’re really easy to watch, follow, and learn from, and the instructor is an absolute delight. It’s impressive to see lessons that are considered ‘upper level’ math presented with such ease and in such manageable… Continue reading