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Seasons Earth 3D Explorer Step by Step
The Seasons Earth 3D Explorer starts as soon as the page loads: drag to orbit the Sun and Earth, scroll to zoom, and press Play year. Everything renders on your own device - no install, no account.
Step 1 - find the tilt
Look for the orange axis and 23.44 deg obliquity in the panel. Tropic guides mark Cancer and Capricorn.
Step 2 - jump solstices
Click Jun solstice then Dec solstice so the yellow subsolar marker reaches about +/-23.44 deg.
Step 3 - scrub the year
Drag Day of year through equinoxes near 0 deg declination, then fullscreen to keep controls visible while you orbit the view.