National Geographic Documentary Films are committed to bringing the world premium documentaries that cover timely, provocative and globally relevant stories from the very best documentary filmmakers in the world. pledge. Learn more about the celestial bodies that exist within our solar system. Learn about Earth's neighborhood. Thousands of years before the invention of the Internet or Super Mario Kart, people entertained themselves by peering into the night sky and connecting the stars to create pictures—called constellations—of animals, objects, and legendary heroes.

Explore National Geographic. As part of the initiative launch, National Geographic urged audiences to take part in the Planet or Plastic? Solar System.

A world leader in geography, cartography and exploration. Science Reference. What is a Planet?