Meanings

cluster of galaxies

galactic equator

group of galaxies

supercluster of galaxies

galactic coordinates

supercluster of galaxies

catadromous fish (fish that migrates downstream, e.g. eel)

downstream migration

river fish

bluespotted boxfish (Ostracion immaculatus)

Takifugu snyderi (species of pufferfish)

purple puffer (Takifugu porphyreus)

Japanese spatterdock (species of water lily, Nuphar japonica)

class A river

red-eyed puffer (Takifugu chrysops)

form of bondage torture in which the victim is hung from the ceiling with their hands and legs bound behind them and a rock placed on their back (Edo period)

spiral galaxy

radio galaxy

spiral galaxy

irregular galaxy