Earth is the third planet from the Sun and the only known celestial body to harbor life. It is a terrestrial planet with a solid rocky surface, oceans covering about 71% of its area, and a protective atmosphere. Earth orbits the Sun in the habitable zone, has a tilted axis causing seasons, and a moon influencing tides. With diverse ecosystems, it supports millions of species and is home to human civilization. Earth formed approximately 4.54 billion years ago and has since undergone significant geological and biological evolution.
