Earth is the third planet from the Sun and the only known astronomical object to harbor life.

Its designation is derived from Old English and Middle English, evolving from the words "eorþe" and "erthe."

• Formed over 4.5 billion years ago, Earth is a terrestrial planet, meaning it has a solid surface.

• It has a dynamic global ecosystem including:

  • A substantial atmosphere.

  • Liquid water.

• It features plate tectonics, which reshape its surface over vast stretches of time.

Earth's unique characteristics have fostered the development and sustainability of a wide array of life forms.

More information is available at: NASA - Earth