BepiColombo consists of two spacecraft, the Mercury Planetary Orbiter (MPO) and the Mercury Magnetospheric Orbiter (Mio).
Mio, equipped with plasma instruments, a sodium exosphere spectral imager, and a dust monitor, will study Mercury's space environment.
Mio's main scientific objectives include understanding the structure and origin of Mercury's magnetic field, the structure and dynamics
of its magnetosphere, the structure and origin of its exosphere, and the physical environment of the inner heliosphere.