I shouldn't bust my sorry ass here, since I said I would leave, but I found another problem with universal Sailor Moon. I'm going to use a real-life example here.
The Galaxy Cauldron, in the manga, is located inside the Sagittarius Zero Star, which itself is located inside the Sagittarius Alpha Star. Now let's see what is Sagittarius Alpha in real-life:
"
Sagittarius A or
Sgr A is a complex
radio source at the
center of the
Milky Way. It is located in the constellation
Sagittarius, and is hidden from view at
optical wavelengths by large clouds of
cosmic dust in the spiral arms of the Milky Way.
It consists of three components, the
supernova remnant Sagittarius A East, the
spiral structure
Sagittarius A West, and a very bright compact radio source at the center of the spiral,
Sagittarius A*. These three overlap: Sagittarius A East is the largest, West appears off-center within East, and A* is at the center of West."
And Sagittarius A*:
"
Sagittarius A* (pronounced "Sagittarius A-star", standard abbreviation
Sgr A*) is a bright and very compact
astronomical radio source at the
center of the
Milky Way, near the border of the constellations
Sagittarius and
Scorpius. It is part of a larger astronomical feature known as
Sagittarius A. Sagittarius A* is thought to be the location of a
supermassive black hole,
[6]
[7]
[8] like those that are now generally accepted to be at the centers of most
spiral and
elliptical galaxies. Observations of the star
S2 in orbit around Sagittarius A* have been used to show the presence of, and produce data about, the Milky Way's central supermassive black hole, and have led to the conclusion that Sagittarius A* is the site of that black hole.
[9]"
Source: Wikipedia.
The Sagittarius A* is located at the very center of the Milky Way. The "supermassive black hole" is likely Naoko's interpretation of the Galaxy Caludron, but this time she turned it into a place where "all the stars and planets in the galaxy are born".
https://gallery.missdream.org/albums/scanlation_smoon/smoon_act56/005.jpg
The scan also literally says it's the place where everything in the galaxy (NOT the universe) is born.
So basically the Galaxy Cauldron is probably Naoko's interpretation of the gigantic black hole found inside the real Sagittarius A* of our own Milky Way. This contradicts what you guys are saying about "Galaxy Caludron is the source of everything in the universe". *sneaks out*