🌠 Gallery

Solar System & Eclipses Explorer

Sorting Planet Families — Compare all eight planets by radius, from 0.38× Earth (Mercury) to 11.2× (Jupiter), and see why four dense, rocky terrestrial planets (density 3.9–5.5 g/cm³) split off from four light gas giants (0.7–1.6 g/cm³). The Sun’s Face — Step through 25 days in 5-day jumps to watch sunspots drift across the surface as the Sun rotates, and pick through four features one at a time: granulation, sunspots, prominences, and corona/flares. Solar and Lunar Eclipses — Cycle through five alignments — none, total solar, partial solar, total lunar, partial lunar — and learn that because the Moon’s orbit is tilted 5°, most months pass with no alignment at all. In the end, size isn’t what splits the planets into two families — density is, and now you’ve measured it yourself.