Degrees & Minutes: Explaining the 360º System

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Discussion Overview

The discussion revolves around the rationale behind the division of degrees and minutes in the 360º system, particularly questioning why 1º corresponds to 60 minutes instead of the expected 4 minutes based on Earth's rotation. The scope includes conceptual exploration and historical context regarding measurement systems.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the logic behind the division of degrees and minutes, suggesting that 1º should correspond to 4 minutes based on a 24-hour rotation period.
  • Another participant agrees with this sentiment, describing the base-60 and base-24 systems as outdated traditions, and speculates on the etymology of the term "minute" as a small fraction.
  • A third participant introduces the idea that a degree can be viewed as ten "second minutes" of a circle, contributing to the discussion of fractional divisions.
  • A fourth participant expresses a desire for unification in measurement systems, highlighting the inconsistency in using base-60 and base-24 alongside the metric system.

Areas of Agreement / Disagreement

Participants express disagreement regarding the rationale behind the current system of degrees and minutes, with multiple competing views on its historical context and relevance.

Contextual Notes

Limitations include assumptions about the historical development of measurement systems and the lack of consensus on the appropriateness of the current divisions.

Who May Find This Useful

Readers interested in the history of measurement systems, the rationale behind angular measurements, and those exploring the implications of unit systems in scientific discourse.

DaveC426913
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A little birdy who is apparently too shy to post asks the following:

I have a doubt: considering the 360º for earth, and if it takes 24h to a complete rotation, why 1º corresponds to 60 min? It should be 4 min...
 
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I agree. It is a tradition as sensless and outdated as the mile and the pint.

I believe that the source of it is something along these lines: The word "minute" means small, and I guess a tradition is that 1/60 is a small fraction of something. A second is actually short for the "second minute" or the "second small fraction" so 1/60 of a minute. So 1/60 of anything is a "minute" fraction and 1/3600 of anything is a "second minute" fraction.
 
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So a degree is ten "second minutes" of a circle.
 
mks is such a beautiful system except the base-60 and base-24 time.

I had a fellow physics major who always asked why we are trying to unify science but we haven't bothered to unify the units yet.
 

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