Orbit

"The path described by a heavenly body in its periodic revolution." (National Aeronautics and Space Administration, 2014)

Sources

"Orbit". NASA Glenn Research Center, National Aeronautics and Space Administration. Last modified June 12, 2014.
https://www.grc.nasa.gov/www/k-12/TRC/laefs/laefs_o.html#orbit.
Accessed February 1, 2019.