around grade 8 → Astronomy
Choose a course designed around topics commonly taught at an approximate age or learning level. This is not school placement or equivalency; start where you feel comfortable and choose another course at any time.
Each level builds on the one before. Start wherever feels comfortable.
Topics commonly taught around grade 8 · Ages 13–14 · about 7.5 hours
Day and night, the seasons, the stars through the year, the Moon's phases and eclipses, gravity and orbits, and the true scale of the solar system, measured with the numbers an astronomer uses.
Astronomy · Ages 14–18 · about 11 hours
Orbits and gravity, light and telescopes, the solar system, the Sun and the stars, how stars live, die and make the elements, galaxies and the Big Bang, and the search for life, measured with the numbers astronomers use.
Take first: The sky