1.
the phase of flight when a rocket approaches the speed of sound
2.
a device used to dissipate excess heat from the rocket
3.
the roll axis perpendicular to both the longitudinal and lateral axis
4.
the process of two spacecraft coming together in space
5.
a structure at the launch pad that deflects and directs the rocket's exhaust away from the vehicle during liftoff
6.
a return trajectory that allows a spacecraft to return to its home planet without propulsion
