  The heliospheric Termination Shock is the largest (by dimension) shock in the
heliosphere. It is believed that it is also the strongest shock and is
responsible for the generation of the Anomalous Cosmic Ray component in the
heliosphere. This chapter review the gross properties and observations of the
Termination Shock. It is structured as follows: 1. The heliosphere, providing
the heliospheric stage for Termination Shock formation, 2. The argument for a
heliospheric Termination Shock, 3. The global heliospheric system, 4.
Termination Shock properties, 5. Observations: the Voyager passages, radio
observations, plasma waves and electron beams, traces of plasma and magnetic
field, energetic particles, galactic cosmic rays, Termination Shock particles,
the anomalous cosmic ray component, 6. Conclusions.

Astrophysics