supershell

English

Etymology

super- +‎ shell

Noun

supershell (plural supershells)

(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”)

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