# Rocket

## Explanation

Rockets are non-air breathing aircraft and spacecraft that propel with the help of thrust generated by a rocket engine. As the propellant burns inside the combustion chamber, the hot expanding gases accelerate out of the nozzle, creating a forward thrust due to Newton’s third law of motion.

This is expressed in Tsiolkovsky rocket equation as, $\Delta v = v_\text{e} \ln \frac {m_0} {m_f}$.