Mercury
noun, の adjective
The water star is the planet Mercury. That's where we hid all of our secret moon water. Mercury looks enough like our moon, so we put it there so no one could find it.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
水星のクレーター
Mercury's craters
水星の大きさ
the size of Mercury
水星のそば
near Mercury
月は、水星より小さい。
The moon is smaller than Mercury.
水星には大気がありません。
Mercury does not have an atmosphere.
山の上から西の方に水星を見ることができます。
You can see Mercury in the west from the top of the mountain.