Mercury/Hermes is the god of commerce, travel and thievery in Roman mythology. The planet probably received this name because it moves so quickly across the sky.
Venus/Aphrodite is the Roman goddess of love and beauty. The planet is aptly named since it makes a beautiful sight in the sky, with only the Sun and the Moon being brighter.
Earth is the only planet whose English name does not derive from Greek/Roman mythology. The name derives from Old English and Germanic. There are, of course, many other names for our planet in other languages.
Mars/Ares is the Roman God of War. The planet probably got this name due to its red color.
Jupiter/Zeus was the King of the Gods in Roman mythology, making the name a good choice for what is by far the largest planet in our solar system.
Saturn/Demeter is the Roman god of agriculture and harvest.
Uranus/Uranus is the ancient Greek deity of the Heavens, the earliest supreme god, father of the titans.
Neptune/Poseidon, was the Roman god of the Sea. Given the beautiful blue color of this planet, the name is an Excellent choice!
Pluto/Hades is the Roman god of the underworld in Roman mythology. Perhaps the planet received this name because it's so far from the Sun that it is in perpetual darkness.
