Im new to Wikipedia, and astronomy, and would like a discussion (and hopefully confirmation) before attempting such an edit myself. 149.99.132.243.

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The article badly needs a figure, words just arent enough (picture 10,000 words).

I shall report final outcome, and perhaps interim observations and edits on this talk page, even if perhaps in a new section within it.

Jerzy t 14:25, 8 February 2019 (UTC).

I think it would be better to make clear early on that the Ecliptic is a circle inscribed on the celestrial sphere, because, technically, the intersection of a plane through a sphere is still a plane.

If we think in terms of planes, then the intersection of the ecliptic and equatorial planes forms a line we can call the equinox: streching in both directions from Earth infinitely into space.

The segment of this line facing the Sun at the time of the March equinox, we could think of as the March (or vernal in the Northern hemisphere) equinox line segment.

The other line segment is the September equinox line segment).

The point where this line interesects the celestial sphere would be the point of the equinox (either vernalautumnalMarchSeptmeber depending on the point behind the Sun at the time of the equinox).

All of these are distinguished though related from the date-time equinox as a point in time related to the position of Earth relative to the Sun.

If we instead think of these as circles inscribed on the celestial sphere as projections of the ecliptic and equator onto the sphere then they immediately define a point.--Cplot 03:13, 1 July 2006 (UTC).

But what we see is an intersection of these planes and this line with the celestial sphere.

Both the ecliptic and the equatorial plane intersect as circles, while the line intersects in two points: the both equinoxes.

Tauolunga 06:48, 1 July 2006 (UTC).

Im new to Wikipedia, and astronomy, and would like a discussion (and hopefully confirmation) before attempting such an edit myself.

Obliquity Of The Ecliptic Excel