» Sat Aug 25, 2012 2:42 pm
Earth is the name of our planet, and a generalized name for ground. It dates from middle english, and is can be exchanged with the word "Terra", which was the roman goddess that personified the plant.
Yes, our planet is bascially named "Ground."
http://www.thefreedictionary.com/earth
http://www.etymonline.com/index.php?term=earth