Neptune suna ne da ke iya nuni ga abubuwa biyu mabanbanta: A cikin tatsuniyar Romawa, Neptune shine allahn teku, girgizar ƙasa, da dawakai. Yawancin lokaci ana kwatanta shi da trident kuma yana ɗaya daga cikin manyan alloli goma sha biyu a cikin pantheon na Romawa. Neptune kuma ita ce duniya ta takwas daga rana a cikin tsarin hasken rana. Katuwar iskar gas ce kuma ita ce ta hudu mafi girma a duniya a tsarin hasken rana. An ba shi sunan gunkin Roman Neptune.