  Magnetic reconnection occurs ubiquitously in the universe and is often
invoked to explain fast energy release and particle acceleration in high-energy
astrophysics. The study of relativistic magnetic reconnection in the
magnetically dominated regime has surged over the past two decades, revealing
the physics of fast magnetic reconnection and nonthermal particle acceleration.
Here we review these recent progresses, including the magnetohydrodynamic and
collisionless reconnection dynamics as well as particle energization. The
insights in astrophysical reconnection strongly connect to the development of
magnetic reconnection in other areas, and further communication is greatly
desired. We also provide a summary and discussion of key physics processes and
frontier problems, toward a better understanding to the roles of magnetic
reconnection in high-energy astrophysics.
