See SpaceX's Falcon Heavy rocket land all 3 boosters for the first time
INSANE! SpaceX Falcon Heavy Side Boosters Landing Simultaneously at Kennedy Space Center
SpaceX lands rocket at sea, makes history
Model Rocket with Strap-on Boosters
A booster rocket is either the first stage of a multistage launch vehicle, or else a shorter-burning rocket used in parallel with longer-burning sustainer rockets to augment the space vehicle's takeoff thrust and payload capability. Boosters are traditionally necessary to launch spacecraft into low Earth orbit, and are especially important for a space vehicle to go beyond Earth orbit. The booster is dropped to fall back to Earth once its fuel is expended, a point known as booster engine cut-off (BECO). The rest of the launch vehicle continues flight with its core or upper-stage engines. The booster may be recovered and reused, as was the case of the Space Shuttle and more recently SpaceX.
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