Noun
かいおうせい
海王星は、太ようから八ばん目のわく星です。
Neptune is the eighth planet from the sun.
海王星に行くことをずっとゆめ見てきたんです。
I've always dreamed of going to Neptune.
海王星は1846年9月23日に発見されました。
Neptune was discovered on September 23rd, 1846.
The star named after the king of the ocean is Neptune! If you know anything about Roman mythology this should be easy to remember!
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.