The Earth is the third planet in our solar system, formed approximately 4.54 billion years ago. It's a terrestrial planet, comprising 71% water, 30% land, and 1% atmosphere. With a diameter of about 12,742 km, Earth orbits the Sun at 107,826 km/h. Its diverse features include oceans, continents, mountains, valleys, and atmosphere, supporting life through complex ecosystems. Earth's unique conditions, including gravity, magnetic field, and climate, make it an ideal habitat for a vast array of flora and fauna, including humanity.