Plasma processes at the scales of galaxies and clusters of galaxies
  Matter on large scales in the Universe is distributed in form of sheets,
filaments and spherical halos. Most of the known matter in the Universe is in a
diffuse plasma state - in halos around galaxies and clusters of galaxies, and
in the intergalactic medium tracing the large scale cosmological filaments.
Recent multi-wavelength observations have informed us about the state of this
dilute plasma that covers a range of densities and temperatures. Progress in
high resolution numerical simulations allows us to understand this diffuse
plasma, but there are several puzzles that involve a complex interplay of
processes such as cooling, feedback heating, gravity, and turbulence.
