Difference between revisions of "Velocity of Escape"
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Velocity of Escape
</dt>
The initial speed an object, particularly a molecule of gas, must have at
the surface of a celestial
body to overcome the gravitational
pull and proceed out into space without returning to the celestial body. Also
called escape velocity, escape speed.
</dd>
The velocity of escape determines a body's ability to retain an
atmosphere. The velocity of escape on the surface of the earth is nearly 7
miles per second, neglecting air resistance.
</dd>
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
