Assertion: speed | /r/CapableOf | escape gravity of the second body
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text: When escaping a compound system, such as a moon orbiting a planet or a planet orbiting a sun, a rocket that leaves at escape velocity ( v e 1 {\displaystyle v_{e1}} ) for the first (orbiting) body, (e.g. Earth) will not travel to an infinite distance because it needs an even higher speed to escape gravity of the second body (e.g. the Sun).