The ESA/NASA Solar Orbiter mission will address the central question of heliophysics: How does the Sun
create and control the heliosphere? The heliosphere represents a uniquely accessible domain of space, where
fundamental physical processes common to solar, astrophysical and laboratory plasmas can be studied under
conditions impossible to reproduce on Earth and unfeasible to observe from astronomical distances. In this
paper, we present a brief overview of the mission.