Free online courseRocket Science for Everyone

Course Description

Rocket science is not just for engineers. It shows up every time you use GPS, watch a live broadcast, check the weather, or capture a photo that depends on space-based technology. This free online course turns the big ideas behind modern spaceflight into concepts you can actually picture, helping you understand what satellites do, how rockets reach orbit, and why the rules of motion in space feel so different from what we experience on Earth.

You will build a clear mental model of orbits by exploring what it really means for something to be in orbit, where space begins, and how different orbital neighborhoods work. Instead of treating acronyms like LEO, MEO, and GEO as trivia, you will connect each region to practical missions—like why GPS satellites sit where they do, how a spacecraft can seem to hover in the sky, and why certain orbits are ideal for mapping every part of Earth in detail. Along the way, Kepler’s and Newton’s laws become tools you can use to reason about speed, altitude, and orbital periods without needing advanced math.

The course then connects those orbital fundamentals to the physics of launch. You will see why airplanes cannot simply fly to space, why rockets behave the way they do, and what tradeoffs separate solid motors, liquid engines, and advanced propulsion approaches. The logic behind multistage rockets and the rocket equation is explained in an intuitive way, so you can understand why reaching orbital speed is such a demanding challenge and how engineers squeeze the most performance out of a launch. You will also learn why Earth’s rotation matters and how launch direction can influence the energy needed to reach orbit.

Finally, you will step inside a satellite and learn how key subsystems work together: structure, power, communication, imaging, and the harsh testing needed to survive launch and space. Short questions and exercises throughout help you check your understanding and turn interesting facts into durable knowledge. Whether you are exploring astronomy as a hobby or looking to strengthen your science foundation, this course offers a practical, confidence-building path into the world above our atmosphere.