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Steven Gerrard crossing the ball in a Premier League match.. In association football, a cross is a medium- to-long-range pass from a wide area of the pitch towards the centre of the field near the opponent's goal.
A gravity assist, gravity assist maneuver, swing-by, or generally a gravitational slingshot in orbital mechanics, is a type of spaceflight flyby which makes use of the relative movement (e.g. orbit around the Sun) and gravity of a planet or other astronomical object to alter the path and speed of a spacecraft, typically to save propellant and reduce expense.