Let's be realistic RocketPy is an innovative rocket trajectory simulator that includes features never seen before in the state-of-the-art rocket trajectory simulators. The sky is not the limit! RocketPy's environment construction uses weather data from several meteorological agencies, providing precise information about atmospheric conditions and taking into account different kinds of uncertainties associated with the mathematical models of the phenomena. Read our paper on the Journal of Aerospace Engineering to know more about the mathematical models and the software architecture. Simulation is all about predictions From rocketeers to rocketeers RocketPy is an Open Source software created by rocket enthusiasts. Since it is open source, each and every one of you is more than welcome to be a part of it. Check out our project on GitHub. A key feature in RocketPy is the Monte Carlo analysis, which shows the confidence interval of the impact coordinates. RocketPy was also successfully validated for several rockets, with apogee predictions showing deviations of the order of 1% when compared to actual flight data. See a list of comparisons and examples in our documentation .