Confused by this armillary sphere in Australia

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SUMMARY

The armillary sphere in Australia incorrectly represents the orientation of the axial arrow and the corresponding zones. The axial arrow should dip north at 23.5 degrees, positioning the torrid zone down the axis and the temperate zone up to the south. Additionally, the color coding of the zones is reversed, with "torrid" marked in blue and "temperate" in red, contrary to conventional color associations where hot is red and cold is blue. This misrepresentation highlights a significant misunderstanding of the physical principles governing the sphere's design.

PREREQUISITES
  • Understanding of celestial mechanics and axial tilt
  • Familiarity with the concepts of the torrid and temperate zones
  • Knowledge of color theory in scientific representations
  • Basic principles of armillary sphere design
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  • Research the axial tilt of Earth and its implications on climate zones
  • Study the historical significance and design of armillary spheres
  • Explore the conventions of color coding in scientific diagrams
  • Investigate the role of astrophysics in understanding celestial objects
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Students of astronomy, educators in Earth sciences, designers of educational tools, and anyone interested in the accurate representation of celestial phenomena.

swampwiz
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I presume that the sphere is pointing at the declination of -90, and that the descriptions "torrid" & "temperate" correspond to tropic & non-tropic, respectively; as such, it seems that these descriptions are on the wrong sides.

https://en.wikipedia.org/wiki/Summer_solstice#/media/File:Longreach_at_Midday_of_Summer_solstice.jpg

Longreach_at_Midday_of_Summer_solstice.jpg
 
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You are correct. They have made a muddle of the orientation.
The axial arrow should dip north at 23.5 deg, with most of the sphere on the lower, (equator), end of the axis. Then the torrid zone will be down axis, with temperate up axis to the south.
 
Baluncore said:
If you look here, you will see a different perspective.
https://foursquare.com/v/tropic-of-...254d8457?openPhotoId=52647444498e6bff66ac585e
Of course, "torrid" is in blue, while "temperate" is in red, which is the opposite of the standard idiom of hot=red, cold=blue. Of course, those of us that have deep understanding of physics (especially astrophysicists) would say that hot=blue, cold=red. :smile:
 
swampwiz said:
Of course, "torrid" is in blue, while "temperate" is in red, which is the opposite of the standard idiom of hot=red, cold=blue.
But their tropical sphere is painted red, so they reversed the convention when printing the torrid sign.
 
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