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[i]NASA's Webb team analyzed the JWST's initial trajectory after its launch atop an Ariane 5 rocket from ESA's Centre Spatial Guyanais in French Guiana. They found that the Ariane 5 did its job better than expected and the course corrections required less fuel than was originally estimated. As a result, the main engines and the eight smaller attitude thrusters of the spacecraft have a larger remaining supply of the 43 gal (159 l) of hydrazine fuel and 21 gal (79.5 l) of dinitrogen tetroxide oxidizer originally loaded aboard. Rocket fuel is the biggest limiting factor of a craft's lifespan. Because it's needed for station keeping and attitude control, the more there is means the longer a mission can be.[/i]
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