Every Year the Sun Makes a Figure Eight in the Sky. Here's Why
Briefly

The article discusses the sun's daily and annual motion, highlighting the concept of the analemma, which represents the sun's path forming a lopsided figure-eight over a year. This phenomenon illustrates the effects of Earth's axial tilt and the ellipticity of its orbit, which together create this pattern. If Earth had no axial tilt and followed a perfect circular orbit, the analemma would not exist, as the sun would always occupy the same position in the sky. The intricacies of these celestial motions offer both a measurement of time and an insight into Earth's unique orbital characteristics.
The sun's position forms a lopsided figure eight in the sky known as the analemma, reflecting Earth's axial tilt and orbital eccentricity.
Without axial tilt and a circular orbit, the analemma would collapse into a single dot, indicating a consistent solar path.
Read at www.scientificamerican.com
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