I Confused by this armillary sphere in Australia

AI Thread Summary
The discussion centers on the incorrect orientation of an armillary sphere in Australia, which is presumed to indicate a declination of -90. The axial arrow should tilt north at 23.5 degrees, positioning the torrid zone at the lower end and the temperate zone above it. Participants note that the color coding is also reversed, with "torrid" in blue and "temperate" in red, contrary to common conventions where hot is represented by red. This confusion in color and orientation highlights a significant misunderstanding of the sphere's intended representation. Overall, the armillary sphere's design fails to accurately convey its astronomical purpose.
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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