Planets · Constellations · The infinite beyond
Look up. There are more stars in the universe than grains of sand on every beach on Earth. Your journey into the cosmos begins here.
The cosmos
Start close — with the star that gives us life — and travel outward into the vast unknown. Each category is a universe of discovery.
Our star. A medium-sized yellow dwarf that contains 99.86% of all the mass in our solar system and drives all life on Earth.
Mercury, Venus, Earth, and Mars — four small, dense worlds forged from rock and metal. Two are too hot, one is too cold, and one is just right.
Jupiter and Saturn — colossal worlds of swirling gas. Jupiter's Great Red Spot is a storm older than the telescope. Saturn's rings span 282,000 km.
Uranus and Neptune — frigid worlds of ice and methane at the edge of our solar system. Uranus rotates on its side; Neptune has winds topping 2,000 km/h.
Ancient patterns drawn between stars — from Orion the Hunter to Crux the Southern Cross. They guided sailors, farmers, and storytellers for thousands of years.
Beyond our solar system lie billions of galaxies, each containing billions of stars. The Milky Way alone is 100,000 light-years across — and it is just one of trillions.
The Stars Quiz is coming soon — test your knowledge of planets, constellations, and cosmic wonders across four tiers from Easy to Master.