The Synthesis of "Planet Nine"

Discover Sedna, one of the most distant objects in our solar system. Learn why this mysterious dwarf planet's orbit hints at a hidden giant planet.

Discover trans-Neptunian objects (TNOs), the icy bodies and dwarf planets orbiting our Sun in the mysterious, vast region beyond Neptune.

Discover Neptune, the eighth and most distant planet from the Sun. Learn about its icy composition, powerful winds, and mysterious blue appearance.

Discover Pluto, the famous dwarf planet. Learn why it was reclassified and what the New Horizons mission revealed about its complex and icy world.

What defines a planet? Explore the official definition, why Pluto was reclassified, and the exciting search for new worlds beyond our solar system.

Discover Uranus, the seventh planet from the Sun. Learn about its unique sideways rotation, icy composition, and stunning new views from the JWST.

Discover dwarf planets, the celestial bodies like Pluto that orbit the Sun but haven't cleared their orbital path. Learn why they're a hot topic.

Discover our cosmic neighborhood! A simple guide to the Sun, the eight planets, and the celestial bodies that make up our amazing solar system.

Discover Eris, the distant dwarf planet whose discovery challenged our definition of a planet and led to Pluto's reclassification.

Discover Venus, Earth's sister planet. Learn why this world of extreme heat and pressure captivates scientists and fuels new space missions.