Galileo had been due to begin this journey sitting on the tip of
a Centaur rocket stage, which would power it to Jupiter after it was hefted into space inside a space shuttle's cargo bay.
Not exact matches
No other set - up was powerful enough to lift the Galileo spacecraft into orbit attached to this
rocket stage, so the
Centaur was ditched, leaving the mission team to find another way to get to Jupiter.
Starliner will fly atop a United Launch Alliance Atlas V N22 (meaning it has no payload fairing, two strap - on solid
rocket boosters and a dual - engine
Centaur upper
stage) from Cape Canaveral's Space Launch Complex 41, while Crew Dragon will fly atop SpaceX's Falcon 9
rocket from the Kennedy Space Center's Launch Complex 39A.
New Horizons will be launched aboard an Atlas 5 «551» vehicle, with a bulbous five - meter payload shroud built by the Swiss contractor Contraves, five Aerojet - built solid
rocket boosters, another single - engine
Centaur, and a Star 48B third
stage.
While Friday's Mars launch used the «401» configuration of the Atlas 5, with a four - meter payload fairing atop the nose, no solid
rocket boosters, and a
Centaur upper
stage with a single RL10 powerplant, the next flight will give an extra kick to its cargo.