Escape Velocity
With a blue ocean and sky as the backdrop, smoke and steam surround the launch pad as a spacecraft lifts off

NASA's New Horizons spacecraft is the fastest ever launched, speeding away from Earth at an escape velocity of 36,000 miles per hour. Image Credit: NASA

      the speed needed for an object to break away from the gravitational pull of a planet or moon

After blastoff, the space shuttle has to go seven miles per second to reach the escape velocity of Earth.

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