There is only one natural satellite of the planet Earth. The Earth’s rotation is gradually slowing. Earth has a powerful magnetic field. The Earth was once believed to be the center of the universe. The Earth is the densest planet in the Solar System. Earth is the only planet not named after a god. Earth is the only planet not named for a mythological god or goddess. The rotation of the Earth is gradually slowing down. Earth is the most dense planet in the solar system. The Earth was once believed to be the center of the universe. The gravity between the Earth and the Moon causes the tides on Earth. The Earth’s atmosphere is composed mainly of nitrogen (78%), oxygen (21%), argon (.93%), and carbon dioxide (0.03%). The Earth is around 4.6 billion years old according to scientists. The Earth is the densest planet in the Solar System.