We really dont know. It was discovered by whoever was living at that time. Could have been caveman.
caveman lived on earth.. and i dont think they would be so smart to actually know what they're standing on LOL
Planet Earth.
planent venus. the third planent from the sun.
A very small group of individuals who have contributed to the betterment of Planent Earth.
what is the planet structure of the planet Saturn
because its the only planent that can sustain life (eg water, oxegon)
Pluto.
It just does cuz its cool
its a dwarf planent. but yes, its a rock.
Mars - 24.6 hrs
i really dnt know sorry. lol
Jupiter, Saturn, Uranus, and Neptune all have rings :D
Uranus. Its axis' tilt is 80 degrees, or nearly.