Answer: orbiting

AnswerCrossword Clue
ORBITINGCircling the moon
ORBITINGGoing around
ORBITINGTraveling a la Mir
ORBITINGType of rapid transit, modern style.
ORBITINGGoing around the world
orbiting(of a celestial object or spacecraft) Move in orbit around (a star, planet, or moon)
orbitingFly or move around in a circle
orbitingORBIT, to revolve around
orbitingPut (a satellite) into orbit