SkySea wrote:
snip

Thanks to you and WIlliam H. Thanks for tips. So if I put the "North
Celestial Pole" (NCP) into a coordinate converter, the ecliptic
coordinates of the North Celestial Pole are at:

Ecliptic Long Eclipitc Lat
90 00 00.0 66 33 38.6

So, if at the spring equinox, the ecliptic longitude and latitude of
the Sun is:

Ecliptic Long Ecliptic Lat
00 00 00.0 00 00 00.0

The x-y axial orientation of the Earth's axis relative to the ecliptic
is
perpendicular to the direction of the Sun. (???)

But is the 90 degs ecliptic latitude in the direction of Earth's travel
in its orbit or tilted opposite the Earth's orbital direction of
travel?

- Canopus56

P.S. - At the summer solstice, when the Sun is at 90 degs ecliptic
longitude, the north pole points at the Sun at the 270 deg ecliptic
long winter solstice is points away.