supershell

English

Etymology

super- +‎ shell

Noun

supershell (plural supershells)

1. (astronomy) A large region carved out of the interstellar medium by the combination of several supernova shells, leading to a lower density of gas and plasma within that without, larger than any single supernova could create.

Synonyms

• (astronomy): superbubble

Coordinate terms

(space plasmas):

• interplanetary medium (“IPM”)
• astrosphere
  • heliosphere
• interstellar medium (“ISM”)
• nebula
• interstellar cloud
• circumgalactic medium (“CGM”)
• intracluster medium (“ICM”)
• intergalactic cloud
• intergalactic medium (“IGM”)