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When to Use Earth Perihelion & Aphelion 3D Explorer - Best Sessions and Limits
Open the Earth Perihelion & Aphelion 3D Explorer when you need a real Sun-Earth distance lesson with published perihelion and aphelion figures - without pulling a live ephemeris.
A distance-and-misconception lesson
A lesson starts when you jump between perihelion and aphelion and see the roughly 5-million-km swing, then read why that is the opposite of what "closer to the Sun means hotter" would predict.
Sessions this explorer does not fit
Sessions this page does not fit are lessons about WHY the seasons happen - that is axial tilt, not distance; use the Seasons Explorer for that - or general adjustable-eccentricity orbit mechanics; use the Kepler Orbits 3D Explorer. Walk the controls in the step-by-step guide.
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