Thread: The awful pivot
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Old September 21st 18, 08:23 AM posted to sci.astro.amateur
Gerald Kelleher
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Default The awful pivot

The previous post, however technically accurate, was badly written so hands up on that.

http://afewbitsmore.com/img/2015_ecliptic.png

Concentrating on the June/December Solstices, the daily arcs of the Sun are almost completely ignored despite the ability in the 21st century to make observations on the changes in the daily path of the Sun from Solstice to Solstice which produce inverted arcs -

https://apod.nasa.gov/apod/ap161221.html

Of course the time lapse jumps the tracks after 1:53 with the worthless wandering Sun for the focus here is matching orientations of the Equator and other latitudes with observations of the path of the Sun.

Today, referenced off the orbital plane, sunrise and sunset on the Equator is 23 1/2 degrees North and South of the orbital plane whereas on the Solstices, sunrise and sunset is on the orbital plane with pronounced arcs depending on whether it is the June or December Solstice -

https://en.wikipedia.org/wiki/Deep_S...-tilt-23.4.gif


It is a falsehood to define the Equinox as equality of light everywhere on the planet, Polar sunrise on the Equinox should put a stop to that and draw attention to the North and South Poles as beacons for the surface rotation to the Sun arising from the Earth's orbital motion.