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Cartoon airplane flying in a cloudy sky with red arrows pointing down with the word WEIGHT on each of them

Just like a person's body, an airplane's weight is pulled downward toward Earth. Image Credit: NASA

      the measure of the pull of gravity on an object

NASA astronauts do not feel the effect of gravity in space, which makes them seem like they have no weight, or feel weightless.

More Information:
http://exploration.grc.nasa.gov/education/rocket/rktwt1.html   →
http://scifiles.larc.nasa.gov/text/kids/Problem_Board/problems/flight/weight2.html   →