SPACE: ESCAPADE on its way to Mars after Earth flybys. “During both flybys, the Rocket Lab-built spacecraft fired their engines, using a principle called the Oberth effect to maximize the performance of the maneuver. It was the first time a NASA spacecraft used such a powered flyby to go to Mars.”

And that was after they spent almost a year hanging out at the Earth-Sun L-2 Lagrange point waiting for the right moment.