Astronomy & Space
Explore astronomy and planetary science beginning with our own Solar System. Science University explains how the Sun, planets, moons, dwarf planets and smaller bodies are organized, how the system formed and how spacecraft observations continue to change what we know. Distances, classifications and planetary processes are presented with scientific context rather than simplified lists alone. Use this subject hub as a starting point for understanding our local cosmic neighborhood and the broader principles scientists use to study planetary systems.
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The Solar System: Planets, Moons and Small Bodies
The solar system contains one star, eight planets, dwarf planets, hundreds of moons and vast populations of asteroids and comets. Here is how the system formed and is organized.