A universal rocket is a type of rocket engine that can be used to fuel many different types of space vehicles. Unlike other kinds of rocket engines, a universal rocket can be used to power spacecrafts to explore different planets or to launch satellites and other spacecrafts into space. Instead of having a separate rocket for each mission or task, a universal rocket gives a lot of flexibility for engineers and astronauts to pick and choose their spacecraft and missions. Universal rockets are usually much larger than other types of rockets and they burn fuel much more efficiently, making them more powerful and reliable.