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Petite Explorers · Little Cosmos

A solar system to explore together.

Little Cosmos is a free interactive 3D solar system for kids and parents. Meet the planets, get closer to their moons, and follow a child's curiosity through space.

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Small discoveries. A very big universe.

Choose any of the eight planets, rotate the view, and zoom in for a closer look. Explore moons, dwarf planets, the asteroid belt, and the International Space Station. Simple learning cards and optional spoken narration bring each destination to life.

Wonder, Discover, and Explore offer different amounts of detail. Start with a little wonder, then follow the questions that come next.

Made for exploring side by side

The experience is designed for young children, including preschoolers, exploring with a parent or caregiver. It runs in a web browser on a computer, tablet, or phone. No account or download is needed for core exploration.

A model for learning

Easy to Explore enlarges worlds and compresses spacing so they are easier to discover. True Distances offers scale comparisons; close-ups are magnified. Orbits and positions are illustrative, not a live map of the sky.

Imagery includes credited NASA resources and other astronomical textures. Where spacecraft imagery is limited, the experience identifies illustrative surfaces. Petite Explorers is an independent project, not a NASA product.

What does my browser need?

Enable JavaScript for the interactive explorer. The 3D view uses WebGL2; an illustrated fallback keeps lessons and destination selection available when 3D rendering is unavailable. Narration starts only when you choose to listen.