Translation of "planets" into Chinese

The earth is not a star, but a planet.

地球不是恒星,而是行星。

They have both failed to find the most serious problem that has ever faced our planet.

他們倆都未能找到我們的星球所面臨最嚴重的問題。

Scientists can easily compute the distance between planets.

科學家們可以很容易地計算出行星之間的距離。