The image, synthesized from records from March 10, 2024, to March 1, 2025, shows the movement of the sun and seasonal changes in Earth's sky. This curve, indicating how the sun traces a figure-eight shape, is sometimes referred to as an analemma. The image was captured in the sky south of Stephenville, Texas, every day at 6:38 p.m.
On the summer solstice on June 20, 2024, and the winter solstice on December 21, 2024, the sun is positioned at the top and bottom of the curve, respectively. They signal the astronomical beginnings of summer and winter in the Northern Hemisphere. The vernal equinox in 2024 was on September 22, and the vernal equinox in 2025 is on March 20. This signifies the beginnings of autumn and spring in the Northern Hemisphere.