Free online course Aerospace Engineering

About the free online course

Step into the engineering behind rockets and spacecraft and learn to reason about flight where everyday intuition stops working. This free online course introduces the physical principles that govern motion beyond the atmosphere, helping you connect forces, momentum, and reference frames to the realities of spaceflight. You will gain a solid foundation in how rockets differ from cars, aircraft, or simple projectiles, and why space missions are driven by velocity requirements, orbital mechanics, and careful propulsion design.

You will work through the core ideas that shape modern aerospace engineering, from motion in space and rotational frames of reference to the practical meaning of orbital speed, circular orbits, and geostationary altitude. Instead of treating these as isolated facts, the course builds engineering judgment: how to estimate what it takes to reach orbit, when escape velocity matters, and how mission delta V influences the entire vehicle architecture. This context is essential for anyone considering careers in aerospace, mechanical systems, or adjacent fields that value rigorous modeling and systems thinking.

A major focus is rocket propulsion, including the rocket equation, staging strategies, and propulsion efficiency. You will learn how design tradeoffs affect payload fraction, why upper stages are so influential, and what performance constraints appear at liftoff compared with high-altitude flight. The course then connects theory to hardware through nozzle concepts: throat conditions, expansion for maximum thrust, characteristic velocity, thrust coefficient, divergence losses, and common geometries such as conical and bell nozzles, along with unconventional designs that adapt across altitude.

Finally, you will explore how engineers choose propellants and predict performance, including mixture ratio effects, chamber pressure influences on combustion chemistry and dissociation, and how equilibrium or frozen-flow assumptions change results. The course also introduces solid rocket fundamentals, typical composite propellant composition, gas generation from burning surfaces, and why certain propellant families are preferred in specific mission types. With targeted exercises throughout, you will finish with a practical, confidence-building understanding of how rockets are analyzed and why real-world propulsion decisions look the way they do.