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Length of the Day

The length of the day is something we take for granted. Yet, much can be learned about the day -- and the way the Earth moves -- from careful observations of the Sun and a more distant star, over as little as 24 hours, with a home-made viewer and a good clock.


Stephen J. Edberg

Date Accepted: 1997-10-30 Grade Group: High School (9-12) Benchmarks: M4.3.7 M4.3.20 M4.4.5 M4.4.6 S14.3.2 S14.4.2 S15.4.4 S3.4.5 Keywords: day solar day sidereal day star day earth's orbit Astronomy analemma seasons Microsoft Word: 07_31_97_1.docx PDF Document: 07_31_97_1.pdf