水母星系是一種被發現於星系團的星系。其象徵為一條觸發星暴的氣體尾巴，由該星系穿越星系團內介質時的衝壓力所形成。
A jellyfish galaxy is a type of galaxy found in galaxy clusters. They are characterised by ram pressure stripping of gas from the affected galaxy by the intracluster medium, triggering starbursts along a tail of gas.
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