EntityQ1104894· pop 27· linked from 487 articlesQ1104894Sign in to savegalaxyConnectionslist of stars in HydraEntityQ1105445EntityNGC 3977Entitylist of NGC objects (3001–4000)EntityNGC 3632EntitystarEntitygalaxyEntityconstellationEntitynebulaEntityexoplanetEntityJohn Frederick William HerschelEntityHydraEntitystar clusterEntityapparent magnitudeEntitydeclinationEntityright ascensionEntityMessier objectEntityNew General CatalogueEntitygalaxy clusterEntityMessier 81EntityCategoriesDiscoveries by John HerschelHydra (constellation)