GEOLOGY STELLAR ASTROPHYSICS GALAXIES

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hot spot

1. A center of persistent volcanism, thought to be the surface expression of a rising hot plume in a planetary mantle (as seen, for example, on Earth and on Io).
   
      • GEOLOGY AND PLANETARY SCIENCE



2. A small, bright region (also known as a bright spot) in a cataclysmic binary, located either where the matter stream collides with the outer edge of the accretion disk, or at the inner edge of the disk.
   
      • STELLAR ASTROPHYSICS



3. A small, radio-bright region in a lobe of a radio galaxy, thought to be caused by high-speed material in a jet colliding with boundary between the lobe and the intergalactic medium.
   
      • GALAXIES