8A20.05 - Earth's Seasons
- Margaret Stautberg Greenwood, "Geometry and the Cause of the Seasons: The Changing Hours of Daylight and Elevation Angle of the Sun at Noon", TPT, Vol. 60, #8, Nov. 2022, p. 694.
- Benjamin Oostra, "Introducing Earth's Orbital Eccentricity", TPT, Vol. 53, #9, Dec. 2015, p. 554.
- Joe Heafner, "'Knowing' is Not Enough", TPT, Vol. 53, # 5, May 2015, p. 312.
- Charles A. Eckroth, "The Earth's Seasons in 3-D: Part III", TPT, Vol. 31, # 9, Dec. 1993, p. 536.
- Charles A. Eckroth, "The Earth's Seasons in 3-D: Part II", TPT, Vol. 31, # 8, Nov. 1993, p. 508.
- Charles A. Eckroth, "The Earth's Seasons in 3-D: Part I", TPT, Vol. 31, # 7, Oct. 1993, p. 419.
- Jeremy Durelle, "A Smartphone-Based Introductory Astronomy Experiment: Seasons investigation", TPT, Vol. 55, #2, February 2017, p. 122-123.
- R. C. T. Rainey, "Long-Term Changes in Earth's Climate: Milankovitch Cycles as an Exercise in Classical Mechanics", AJP, Vol. 90, #11, Nov. 2022, p. 848.
- Reuben Benumof, "Astronomical Meaning of a Tropical Year", AJP, Vol. 47, #8, Aug. 1979, p. 685.
- Janice VanCleave, "Seasons", Geography for Every Kids: Easy Activities that Make Learning Geography Fun, p. 125.
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