Pre‑Launch Prep
This is pumped into the rocket before launch and makes up most of its mass.
propellant (fuel)
This happens when thrust becomes greater than weight
Lift‑off
Rockets perform this rotation to orient themselves correctly after liftoff.
Roll
This protective shell is jettisoned once the rocket is out of the thick atmosphere
Fairing
The cargo the rocket is designed to carry.
Payload
Mission control must complete these to ensure all systems are functioning correctly.
final functionality checks
This famous sequence begins at T‑10 and counts down to zero.
Launch countdown
These two manoeuvres adjust the rocket’s direction to reach the correct orbital inclination.
Pitch and yaw
This happens when a rocket’s lower stage runs out of fuel.
Stage separation
This occurs when the payload detaches from the upper stage.
Payload separation?
This must be granted by mission control before ignition can begin
launch permission
These engines fire first to begin the launch.
The main engines
The reason rockets change their inclination during ascent
Reaching the desired orbit
This is the moment when the rocket sheds unnecessary mass to improve efficiency.
Fairing separation
This burn is performed to reduce space debris after the mission
Deorbit burn
Simulations and practice countdowns are done for this reason.
Preparing the team for every stage of the launch sequence
This structure must be cleared before the rocket begins its ascent.
The launch tower
During ascent, rockets travel through this part of the atmosphere, causing intense heat and pressure.
Earth’s thickest air
This stage places the payload into orbit.
The second stage
This system must be functioning to track the payload after separation
Communication systems
These environmental factors must be safe before a rocket can launch.
Weather conditions
This variable must be checked to ensure the rocket has a clear path upward.
Flight‑path clearance
As the rocket goes up, it has to steer a little so it doesn’t drift the wrong way. These tiny turns help keep it on the right path to space.
Steering to stay on course
This variable must be checked to ensure the rocket can safely separate stages without collision.
Structural integrity
This factor must be checked to ensure astronauts are physically prepared for launch.
Crew health and readiness