Skip to content

You are offline. Showing saved lessons and simulations.

OrbitLab Learn

Dashboard Learning Paths Arab & Islamic Astronomy Modern Astronomy Tonight's Sky

Switches lessons to a dyslexia-friendly font with wider letter, word, and line spacing. In Arabic, only the spacing changes. Simulator

Explore

Dashboard
Learning Paths
Arab & Islamic Astronomy
Modern Astronomy
Tonight's Sky
Core Concepts
Guided Tour

Our solar system

Overview
The Sun
The Planets
Earth
Mars

The wider universe

Stars
Constellations
Galaxies
Black Holes

Explore and reference

Space Missions
Timeline
Simulations
Glossary

Egyptian Calendars and the Stars

How the ancient Egyptians built a civil calendar from the Sun, the star Sirius, and the night sky.

Loading...

OrbitLab - an interactive astronomy learning portal. Images and audio courtesy of NASA, ESA, the Event Horizon Telescope and LIGO. Interactive visuals are simplified illustrations, not exact simulations.