Home▸Space & Astronomy▸Planetary Alignment: A Rare Conjunction

Planetary Alignment: A Rare Conjunction

Top-down 2D orrery of the eight planets orbiting the Sun at their real Kepler-law periods, with a zodiac ring showing exactly where each planet appears in Earth's sky and how rarely they bunch together.

Space & Astronomy2DEasy60 FPS📱 Mobile-adapted⇄ 3D version

Details

CategorySpace & Astronomy

RenderingCanvas 2D

DifficultyEasy

Target FPS60

ControlsSliders for fast-forward time speed and angular-alignment tolerance, seven toggle buttons to choose which planets count toward the alignment, play/pause and reset-to-J2000 buttons, a 'jump to next tight alignment' search button, drag-to-pan, scroll/pinch-to-zoom, and click-a-planet-for-its-orbital-data.

planetary-conjunctionorbital-mechanicssyzygyastronomynew-year

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⚙ Under the hood

Top-down 2D orrery of the eight planets orbiting the Sun at their real Kepler-law relative periods, with a zodiac ring showing exactly where each one appears in Earth's sky and how rarely they bunch together.

planetary-conjunctionorbital-mechanicssyzygyastronomynew-year

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install