  Laboratory experiments provide a valuable complement to explore the
fundamental physics of space plasmas without the limitations inherent to
spacecraft measurements. Specifically, experiments overcome the restriction
that spacecraft measurements are made at only one (or a few) points in space,
enable greater control of the plasma conditions and applied perturbations, can
be reproducible, and are orders of magnitude less expensive than launching
spacecraft. Here I highlight key open questions about the physics of space
plasmas and identify the aspects of these problems that can potentially be
tackled in laboratory experiments. Several past successes in laboratory space
physics provide concrete examples of how complementary experiments can
contribute to our understanding of physical processes at play in the solar
corona, solar wind, planetary magnetospheres, and outer boundary of the
heliosphere. I present developments on the horizon of laboratory space physics,
identifying velocity space as a key new frontier, highlighting new and enhanced
experimental facilities, and showcasing anticipated developments to produce
improved diagnostics and innovative analysis methods. A strategy for future
laboratory space physics investigations will be outlined, with explicit
connections to specific fundamental plasma phenomena of interest.
