well......... planets can be use in a sentence in many ways for example: our solar system use to have nine planets but now they don't OR My favorite planet is Jupiter (or any other planet that you like.
Planet Earth is where I live.
There was no gravity on that planet.
It was a earthly planet
There is an infinitesimally amount of bacteria in the planet.
planetary has a root word and it is planet
The apocalyptic ship fired on the planet with its main guns.
The Equator divides the planet into northern and southern hemispheres.
The bolide crashed into the planet, resulting in a crater.
Earth is a terrestrial planet. The three other terrestrial planets are Mercury, Venus, and Mars.
Every Planet has it's own ecliptic path. -DaFishSticks
Last year, scientist found a planet the called it Uranus.
A terrestrial planet is a rocky planet similar to Earth, with a solid surface and typically a thin atmosphere.