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Old January 17th 18, 12:03 AM posted to sci.astro.amateur
Gerald Kelleher
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Climate for all planets in the solar system is based on the rate of change in conditions across latitudes as a planet makes a circuit of the Sun and this rate is determined by the degree of inclination -

http://calgary.rasc.ca/images/planet_inclinations.gif

Had the Earth the inclination of Uranus then conditions would be wild in terms of daylight/darkness asymmetry across almost all latitudes making the planet uninhabitable whereas an inclination of Jupiter would produce benign conditions with may also be unfavorable for life and for different reasons.

The is a maximum 90 degree inclination running parallel with the orbital plane and a minimum 0 degree inclination at right angles to the orbital plane thereby creating a climate spectrum. There is therefore no such thing as 'climate change' unless inclination increases or decreases to either side of the spectrum where 90 degrees is a polar climate and 0 degrees is an equatorial climate, not heat/cold conditions but rather how a planet's surface reacts for a given inclination between those two benchmarks.

Pity no astronomers around to enjoy the modeling but that is not such a bad thing in any case.
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Old January 17th 18, 10:09 AM posted to sci.astro.amateur
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On Tuesday, January 16, 2018 at 11:03:59 PM UTC, Gerald Kelleher wrote:
There is therefore no such thing as 'climate change' unless inclination increases or decreases


While this statement is wrong as written, it is true that the inclination of the Earth changes and this does indeed affect climate. Look up Milankovitch cycles:

The angle of the Earth's axial tilt with respect to the orbital plane (the obliquity of the ecliptic) varies between 22.1° and 24.5°, over a cycle of about 41,000 years. The current tilt is 23.44°, roughly halfway between its extreme values. The tilt last reached its maximum in 8,700 BCE. It is now in the decreasing phase of its cycle, and will reach its minimum around the year 11,800 CE.
 




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