In the form of rocket engines they power fireworks, model rocketry, spaceflight, and military missiles. Lofted trajectories are sometimes used in both missile rocketry and in spaceflight. American rocketry pioneer Robert Goddard experimented with rudimentary gyroscopic systems. Another example is backslider rockets in amateur rocketry. Bells crowning achievement in the realm of rocketry was the Agena rocket engine. The Aerobee rocket family was one of the outstanding achievements of early American rocketry. According to NASA, Polish scientists were among the pioneers of rocketry. Rapid advances were made in rocketry, materials science, and other areas. High-power rocketry is a hobby similar to model rocketry. Accelerometers are used to detect apogee in both professional and in amateur rocketry. This film was of enormous value in popularizing the ideas of rocketry and space exploration. It is one of the oldest pyrotechnic compositions with application to rocketry. Hamas deployed its increasingly sophisticated rocketry to replace its martyrdom operations. There are many different possible formulations that will allow for flight in amateur rocketry. This record stood as the European altitude record among all student rocketry programs.