For the similar nickname, please see flyboy.
A flyby was a flight by a spacecraft close to a celestial object.
(DIS: "The Vulcan Hello")
(TNG: "The First Duty")
In the late 2020s, flybys were critical to the Europa Mission as the Shango X-1 had to be protected from the adverse effects of radiation from Jupiter's magnetosphere in Europa's orbit. Making multiple flybys of the moon, the interplanetary vehicle launched its lander and subsurface probe, which then explored the environment of Europa. (PIC: "Two of One")