The Globe, Earth
Noun and の adjective
ちきゅう
地球はお金では買えないよ。
You can not buy the Earth with money.
コウイチは今ごろ地球のうらがわで何をしてるんだろう。
I wonder what Koichi is doing right now, halfway around the globe.
地球という名前を考えたのは誰だ？
Who came up with the name Earth?
The earth sphere! It's where we live and the planet we call home. It's the earth!
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.