Superbubbles were defined and explained in this chapter. Examples were
given, including Cygnus OB 1, the Aquila supershell, the Monogem Ring, NGC 1929
and Orion-Eridanus. It was documented that superbubbles generate and disseminate
radiation. Explosions were also associated with superbubbles. Superbubbles produce
both termination shock and secondary shocks. Plasma waves are created by
superbubbles, it was demonstrated. The inherently turbulent and chaotic inner nature of
superbubbles was documented.
Keywords: Absorption clouds, Aquila supershell, Chandra X-Ray Observatory,
Cygnus OB 1, Fermi Large Area Telescope, equipartition, filaments, Magellanic
Cloud, MHD, Monogem Ring, Max-Planck-ESA Telescope, NASA Spitzer Space
Telescope, National Institute of Nuclear Physics, NGC 1929, Orion-Eridanus,
Padova University, plasma, superbubbles, termination shock, Wolf-Rayet stage.
