A LITTLE MORE UNIVERSE.

Find your cosmic perspective.

Explore distances, worlds and the elegant rules of motion. A quiet place to make sense of a very big universe.

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THE INTERACTIVE DESK

Astronomy / TOOL 01

Orbit period explorer

An ideal two-body model. Enter the semi-major axis in AU and central mass in solar masses; planet mass is neglected.

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2 starter guides

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Orbits

A planet’s year follows a simple pattern: larger orbits take disproportionately longer to complete.

Distances

Light has a finite speed. Every astronomical view is a view of the past.